Keen Sandals. Super cute and pretty much blister proof. My whole family wears them. In all the years we have gone with Keen, 12 hour park days, no one has had a blister yet.

Last time we went, dh had a brand new pair...he was so worried because he hadn't "broken them in". No need. They were perfect! Some of the sandals are really cute, too! My kids wear the Newport H2 or Venice H2 and dh and I wear the same. I also have a pair of strappy super cute ones that are just as good for walking as the Newports.
ETA: I can't wear
crocs of any kind all day long or my ankles kill me. I bring them for the pool and to slip on when running to the main hotel building for food.