I guess it really depends on you. My experience was the opposite of dis75ney. I packed my skechers tennis shoes as an emergency shoe. I also hate wearing tennis shoes and socks when its hot. Hate it. I also brought my crocs mary janes and capris. My first day was a half day, and the mj were great. The next day I wore the capris, and those annoying circulation nubs killed my feet by the end of the day. And my feet just hurt. A no more walking hurt. The next day I went back to the mj. I wore a small footie with them that just covered the bottom of my feet and toes. Not bad, but again, at the end of the day I hurt bad. Day 3 I wore the tennis shoes I swore I wouldn't wear, and they were perfect. Not too hot, and my feet felt awsome all day.
I will try a new sandal next time- thought about fit flops, but I will prob just end up in tennis shoes again.