I just got back and wore my Papillio Frankfurts a couple days, once with socks, once without. I do fine with them in the parks, but then I wear Birk clogs as house slippers and other harder soled shoes all the time. I don't know if I'd honestly wear them every day in the parks - for one, my feet somehow always seem to get wet, so I like to wear a water friendly sandal on Splash Mountain day, as wet Birks can be very bad. But, I don't think they wear my feet out any more than any other shoe/sandal for as much time as you're on your feet on concrete @ the parks.
Have fun!