For me, Crocs Athens flip flops. After between my toes and the tops of my feet got used to the material (for a week or two of having them, I had the tops of my feet pretty much entirely covered in bandages, but the BONES of my feet felt like singing a happy tune and that is what was important), they were *wonderful*.
Speaking of that, I have to buy more if they are still available.
I wear Disney Crocs but I make sure to wear a pair of socks with them at least every other day or for half of every day of my trip (night time). Crocs can rub against the top of your foot and cause a blister. It's quick to take the socks off and toss them in your carry bag when you're going on a water ride
And see, for me, wearing socks with the maryjanes Crocs worked for me in the morning, but as the day worn on, I started getting blisters *because of* the socks! I had to take them off as soon as I felt the rubbing, otherwise, I would get blisters from the nubbies on the bottom and on the top of my feet.
No offense but I can't believe anyone could walk around all day at DLR in Crocs. You must have feet of iron.
I recommend some kind of walking/running shoes or hiking shoes with a lot of cushion and a lot of support. Something that is designed to pound the pavement for long distances. Make sure they are well broken in before your trip! No matter what you wear, your feet WILL be sore at the end of the day, but good shoes can bridge the gap between agony and mild soreness. The funny thing is, our feet only seem to really hurt during the walk back to the hotel after the park closes. Must be a mental thing.
I do NOT have feet of iron. I have sad, hobbit-wide, feet with nearly no arch (it seems).
Running shoes destroy me in the parks (Avia, Saucony, and New Balance have all been tried at
Disneyland/DCA) even though I wear them at home all the time. I can't fit my hobbity feet into the normal basic crocs without feeling extra hobbity, but I bought some maryjanes which don't *really* fit me (b/c they are supposed to fit all wide and breezy), and for awhile they were lovely, but I did have to trade out for my running shoes each day, and sometimes halfway through each day. Back, forth, etc.
And then I met a woman whose adult daughter has wide feet, and she introduced us, and the daughter was wearing Athens (with the tops of her feet covered in bandaids), and she said what was to become my own experience...regardless of what the material did to the skin temporarily, the bones of the feet were better, and that was what was important.
They are so cushy and cushiony and floaty and light! Love my Athens.
But that's why it's important to try to know what will work for you. And if you're not sure, bring a variety.