Thanks for that site, I'd never seen that one before!!
Alley-Oop, one thing you could do that I think would look really cool (a maybe less expensive) would be to layer tank tops in "Disney" colors. Like, layer a red and yellow wifebeater-style tank for Mickey Mouse, a red and a white one for Minnie, blue and yellow for Donald, etc. I'm thinking of doing this on my next trip down. Enjoy your trip, hope you stay cool!!!!