As another year 'round critter flip flop wearer, I feel your pain. Oh the heat, the enclosed shoes, the claustrophobic toes longing to be set free!
The first time we went, I did wear my running shoes in the parks, but I hated it. Sure my feet were free from pain, but I just hated being so confined! I did learn that Berki's were a bad idea as I wore those to SW and my poor little piggies felt strained all day.
Last trip I bought Croc Athens, and while they weren't quite as comfy as the running shoes, my feet felt happy and free!
My current issue is what to do when we go in April b/c I know my feet will be cold in the mornings and at night. I'm thinking maybe Converse Jack Purcell low tops since they aren't as heavy and clunky as running shoes and will still look cute with capris.
But then I was thinking about Vineyard Vines' critter flops...they have arch support and feel totally different from other flops. I think I might try them on a half park day and see what happens.
People have mentioned various styles of Clark's being comfy in the parks, but I can't find any I like.
Can you tell I have put a lot of thought into this? I have an un-natural aversion to my running shoes if there is no treadmill involved, lol.