I'm really glad to see this thread because I was just searching the web for ways to avoid blisters. I've gotten blisters on both feet both times we've gone to WDW. I get them on the bottom of both pinky toes and the toe next to it. I wore Croc's last year and while they were comfortable, I still got blisters. I definitely have sweaty feet, so wrapping them in plastic shoes doesn't help.
I'm confused about the body glide though. If sweat + friction = blisters then how does body glide help? Seems like they'd be wet either way.