For reservations i would call to be sure or juststop by the main building and ask. We have done birthday parties there before and never reserved anything. Just got there early and moved in for the duration. Small kids party so not to many people. I guess if you have a lot better safe than sorry
Call Earth works they can better explain it to you
There is a grain house that sits there in a park that's the house to go to
I would call ahead ,and ask if they can accommodate.
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