Nikon D3100 Camera for Concerts? - 2

I just recently bought the Nikon D3100 and for years I have just simply taking my Kodak Zi8 to concerts and music festivals to simply just record video for my own recollection but I was thinking the other day if the D3100 is fit for the job? The incredible heat, the lengthy day, having enough memory? I have a 16gb memory card, it works fine. SDHC. But can I take it to a concert and it will last me the whole day? Gates open 11 am, I leave around 9 pm. I don't plan on taking many pictures, but many videos. Maybe when I'm actually there I probably will end up taking many pictures, I don't know… Also the music festivals I attend are one with crowd surfing and mosh pits so I was wondering if the D3100 is sturdy and can take a little bit of extra-force. Do you recommend it? Should I take the Zi8 just in case? Also! With the auto-focus and such will I be able to hear it while recording or will the loud music drown it out?

Daniela,

A few points:

1- You need to find out in advance if the concert venue will even allow DSLRs in… Many don't. Some only only allow point & shoots and phone cameras… And some may object to constant video recording.
2- You'll be lucky if your DSLR with one 16 GB (class 10) card lasts for an hour shooting video - even if you are allowed to shoot with a DSLR at the concert. In any case you'd always have to have a backup card or cards (even if only shooting stills).
3- For what you want to do you'd be much better off with the portable videocam (like the Kodak Zi8 or PlaySport model) and multiple (5-7) 16 GB class 10 cards if you want to record all day.
4- Even if you are allowed to take the camera in do you really think it's wise in that type of environment to take an expensive (relative to a P&S or your Kodak videocam) camera in? It could get broken (it is the lowest end Nikon DSLR - it is not ruggedized like a camera considered "pro" class), lost, stolen (don't tempt someone who may be drunk or high).