If you want to have shelter all to yourself for a big party then I would recommend reserving it through the park service's. But if you just want to have a picnic table or two from the the tables at the shelter then you do not have to reserve. If you want to know for certain that you will have tables then it's always best to reserve. But there are plenty of tables in the shelter as well as on the outside of the shelter.
Yes you do
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