Tip from my mom: Her feet swell after shes on them for awhile, so she packs a pair of her well worn and comfy Mickey flip flops in the bag we carry in, and whenever we stop to eat or for a show, she changes into them to let her feet breathe a bit and cool off. I think its a great idea, and those flip flops are light and easy to pack. Just a thought for those worrying about swollen feet or hot feet. =)
She does the parks ALOT and never leaves home without them =)