Going to Vietnam in Summer - keeping DSLR cool?

I'm going to Vietnam in two weeks, which is unfortunately their summer! Vietnam's temperature in January is generally low 30s (Celsius), and I will be taking my Nikon D7000 basically everywhere I go in this heat.

I want to minimize the amount of stuff I have to carry around, so I don't wanna take a camera bag with me. I just wanna have the single camera around my neck and leave all my lenses & equipment in the hotel room. (so that excludes a nice insulated camera bag from the list of suggestions!)

I was just wondering two things:
A) Is the temperature really something I need to be worrying about? Is it really gonna be a problem for my DSLR, or am I just an insane-o?

B) If it's a problem, what are some suggestions? I'm pretty DIY, so I'm open to anything. I was thinking of rigging a small CPU fan to the bottom of the camera, but seeing as the base is PLASTIC, I can't imagine that helping too much with the cooling (would need it blowing on some sort of heatsink pulling the heat away from the CCD - no way I'm touching that!). Plus, y'know, batteries.

Hopefully you can provide some insight

Using electronics abroad? (Europe)?

I'm going to France for 5 months and I'm taking my $600 camera along with me (along with other electronics: video camera, computer (mac), and hair dryer and straightener)

For the mac I bought the travel pac that apple sells so I'm pretty sure that is all i need (if you could confirm this for me that'd be great. I think the big white thing on the end of the plug is a converter for the laptop.)

I also THINK (please confirm) that my camera (which is a Nikon d3100) has an automatic converter.
To charge you take out the battery and plug it into the wall (the plug that I use is very large and I believe all I need to do for that is buy a $2-3 plug that allows me to plug it into a outlet in Europe.

Same thing as my camera for my video camera. My video camera is a Kodak Zx5 and the outlet is a lot smaller than my $600 camera, but there's a thing on the end of the plug that I believe is a converter for currents. Please confirm.

Now for my hair dryer and straightener, these are the 2 things that do not have a large 'thing' on the end of the cords, it's just a wire and the prongs on the end, no box. So are these the only things that I will have to buy 1 of those big expensive current converters for?
Or should I use the current converters for everything?

Upgrading my DSLR camera from Nikon D60 to Canon, need low noise on high ISO?

I'm a student photographer, and I also do studio portraits and wedding photography as a profession.
I currently use a Nikon D60, but I'm wanting to change to Canon due to the fact that all college equipment I use is Canon.
I will be selling my Nikon D60 with the kit lens, large camera bag and fixed 35mm f/1.2 lens, but will also be adding a little money (maybe £200-£300.)
I'd like to know what you would suggest if I'm looking for something with low noise levels on a High ISO, as many of the weddings I shoot are indoors and need faster shutter speeds!
So far I have looked at the Canon 550D or 60D.
I would appreciate any advice!

Added (1). I understand that increased ISO means increased noise.
Hence the need to upgrade. I do not want a shallow depth of field at a wide aperture just to get brighter photographs without altering the ISO. I'm shooting weddings indoors, not roses. The noise levels on the D60 are horrendous.

Is the Nikon D5100 worth the money?

Originally, I had planned on getting the D5000 because I have used it before and I liked it very much. I decided that since I had a (great) experience with it, that I'd get it.
Well, when i went to order it, it was already discontinued. I've been researching it since the beginning of 2011.
Anyway, I just ordered the newer model of it, the D5100, and I'm not quite sure if it's worth the money, and what exactly has been improved quality-wise.
I shoot mostly still-life, both up close and far away, and i plan on making short films with it as well.
Did I make a good decision money-wise?
I'm not regretting my decision, i just want to hear some opinions.

Nikon D3100, Pentax Kr or Canon T2i?

I'm finding it to be a really hard decision…

is it worth the extra money to buy the Nikon D5100?

Critique my Photographs?

I use a Nikon D3100 -

Please be as harsh as possible, It doesn't really matter, I like strict critiques, they do help me! Thanks for your time!

Added (1). I do have more photos on my Computer but they're all over 15 MB which exceeds Flickr's Limit.

Nikon d40, how do i name pics?

Hi when i take a pic it automatically gives it a.jpg name, this is ok, but say if i take 25 pics, so start a 001.jpg up to 025.jpg then when i clear them of the camera, take another 25, and want to put them in the same folder, i can't because the already have that.jpg name, is there anyway i can save the pics by a date stamp or other way,

hope this makes sense, thanks

What macro lens can I get for my Nikon D3100?

My mom got me the Nikon D3100 for christmas this year. This will have been my first upgraded camera since my little compact digital camera, so I'm a beginner. I'm in high school and am very interested in photography. I know that the styles of photography I like include Macro, night/low light, portrait and spontaneous photography, however I'm most interested in macro. (mostly of inanimate objects, not bugs and whatnot)
I heard that under 100mm is better for things that are inanimate and that over 100mm is great for detailed living things, especially since if the "subject" gets scared at the fact that I'm crouching to get the shot it could run away. I'm more interested in a shorter lens but if that's relatively not possible then let me know!
So basically I'm asking what additional lenses I can get for these types of things that I'm most interested in? (aside from the lenses it came with) Of course I would gravitate towards the lower prices, but getting at least an idea is very helpful. And if you have experience with these things, opinions with that is welcome too!

Which lens would suit my style of photography?

I just got my Nikon D3100 a month ago and i'm familiar with all types of Exposure modes and what needs to be known, Basically i'm not into a certain category(Landscapes, Portraits, Macro, etc.) I just take a picture of anything that catches my eye, Now, obviously the 18-55mm and the 55-200mm are not good enough for my style, so i was thinking which would fit my needs and would work well with the Nikon D3100 body?

1 - 35mm f/1.8G
2- 50mm f/1.8G
3- 24-70mm f/2.8

Thanks for your time!

Added (1). I can save up to 2400 a year which is a lot when it comes to our currency. And you obviously have misunderstood my question, i was pointing out 3 of my favorite lens and was hoping to get some equal answers that would suggest me one lens that would suit my style.

How to take a DSLR camera and2 lenses through airport security?

I have a Nikon d5100, with an 18-55mm lens and a 55-300mm lens that I'm taking with me. I also have a Nikon camera bag and I was wondering how I do it. Do I take the lens out and set them on the bin? Or for the 55-300, do I takeit out of the Baggie? I also read that I have to take the battery and SD card out of th bag, and put it in a ziplock bag. How do I make it quick and easy, as I'm traveling with other people.