Well, we just returned a few weeks ago from a 10 day Disney trip so I'll give you my experience. Buying crocs was absolutely the best $30 spent ever! I took a pair of crocs and a pair of tennis shoes. After wearing the crocs for the first two days, I decided to try my tennis shoes. My feet were absolutely killing me in the tennis shoes. After that, it was crocs for the remaining of the trip. I think I did try the tennis shoes one more time and had the same results. The tennis shoes are a couple of years old so they were really broken in. In fact, I wore them last year on our trip. I bought the crocs a day or two before we left. You would not believe the difference it made on my feet. I swear I am not making it up.
I also used body glide on my feet. But, because my feet were a little greasy after putting on the body glide, I couldn't put on the body glide and then immediately put on the crocs. Instead, I would put on a pair of socks to wear while I was getting ready. By the time we were ready to leave for the parks, my feet had mostly absorbed the body glide and I wasn't sliding around in the crocs.
The only problem I had was that I experienced something similar to northwestmom. It's kind of hard to describe so bare with me. On the side of my left foot where the skin changes from the your heel to your ankle, I got a big blister of some sort. It looked and felt like a blister, but when I tried to pop it, there wasn't anything but a mass of skin. It did hurt, but I just kept body glide and some other medicine on it. It didn't effect my walking. I'm not really sure how I got a blister (?) there because there was nothing rubbing against that area.
Oh! Bodyglide works great! My husband wore tennis shoes the entire time. He used the bodyglide and said his feet didn't sweat any. He was really impressed with that purchase. That will also be a mandatory purchase each subsequent trip. It wasn't easy to find. I had to go to their website to find a store in my area that sold it. I also used it on my thighs and didn't have any problems.
Hope this helped!