I second the hard on the feet thing, When we went a few years back, I had gained ALOT of weight, close to wearing a 26 jean. And It was really hard on my feet. REALLY BAD. I was a wreck. But by this past trip (Dec.) I had lost the weight and down to my normal size 10. ( GO ME! ) lol And It wasn't as bad. And it's not like I trained for any marathons in the meantime. I tottally atribute that to the weight loss.
The rides were fine though, had no problem fitting in anything.
Go have fun and get some Dr. Sholes gell inserts for your sneakers.