If I not mistaking if you go to the park and go to the bulletin board there it should have some contact info for you.
Not sure try Google search for contact info on the park. Always people there with their kids
I'm not 100% sure but. I don't think you have to contact anyone. I'm pretty sure you can just use the park, there will be other kids and family's there probably. I don't think you can rent it out
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