Which lenses to take on vacation?

I'm going on vacation to Disney World with my family in a few weeks, and I plan on taking massive amounts of photos there. I currently have a Nikon D3100 with the kit 18-55 VR lens as well as a 10.5 mm fisheye. I'm taking both of them on vacation, probably going to be using the 18-55 as my walkaround, and use the fisheye to take some interesting shots of the interior of the plane on my ride there, and also some interesting perspectives while walking around. I was thinking about also renting a wide angle or ultra wide angle lens for the trip, I think they would make for some great shots outside of the entrances and castles. What do you guys think? Should I just go with the lenses I have now or rent a wide angle lens too?

I personally would take a wide angle lens myself and just the kit lens. Although, which ever lenses you plan on taking, you're going to want to haul around a camera and all that extra equipment the entire time.

It's a vacation. It's ripe with photography experiences and new locations and creativity… But don't forget that it is STILL a vacation. Don't get so bogged down with equipment that you forget to have fun.

At Disney, you might find yourself wanting a telephoto rather than both a fisheye and an ultra-wide angle. My Disney lens would probably be the 18-200vr. The fisheye if you're really into that effect. Lighter and simpler is probably better at WDW anyway.

IT's already going to be tricky getting wide shots without all sorts of annoying people in it. I'd say rent a short tele, a 55-200 for example, would allow you to get some shots of the rest of the family in rides and candid portraits.

Isn't the 10.5mm lens already an ultra wide angle lens? Why rent another one?

I would just use the lenses you have.