Is there a charge to have a birthday party there?

If you want a Pavilion there is

Pavilions $75,$25 for large and small for half day tables are First Come First Served

There is for pavillions

Big pavilions are 75 for half days and small one is 25 for half day and tables in side are fcfs.

I've not necessarily seen anyone get charged. Thigh reservations are recommended.

They have some tables that are covered. Some that are not. I've seen a few people have birthday parties there.

No