Don't think you can leave for that long,I would eat before coming, they do have food thier but it's expensive if you have many people with you. Cheeseburger & fries 8.50.
We were able to go to the car for several items but I don't know about leaving for an hour or so.
Nope, they don't have wristbands or stamps. You can bring your own lunch in a cooler the size of a personal hand bag though
I don't know. They might have a stamping system like the Omaha Zoo has. I'd suggest calling them.
I do not know. They have concession stands there with food. I always just buy my lunch there. Have not been there in years now, well since 2004. There were tables, I'm sure you could pack a lunch, and or just buy drinks there... Or ice cream.
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