Florida is hot, but not incredibly so. There are teams there that survive with black shirts. But, I would suppose someone from that area would be better off telling you the weather. You should know that it is guaranteed to rain at least once while we are down there. I've gone to nationals 4 of the last 5 years and its rained each time. The 1 time it didn't rain was when I wasn't there. I am going again this year, so it should rain
The divisions are split semi-randomly. I've heard that FIRST tries to keep regional winners seperate, but the rest is completely random, so it is unlikely that all your buddies will be in the same division. However, all the pits are still in the same tent; its not like your friends will be scattered all throughout Disney World.
The best advice I can give is to work hard and have a blast!
