Do u have to reserve a pavillion or anything to use them?

I think you do but Yes, best to call Park and Recreation or they might have a web site

I've used several without....

I believe you can just use them. But you would run the risk of somebody having reserved it. So it would be wise to reserve it if you have a certain time you need to use it

Not to my knowledge. Just get there early to claim it as yours.

Pavilions need to be reserved.

Yes there is a pavillion. You can use it but if someone has a reservation they have priority.

Gosh, i haven't seen them used. Im not sure

Most of the time you only have to reserve them if they are being used for a private function, like an office party.

I agree with Andres. Better to call for more info.

Good question, I think that is better to ask or call Park and Recreation off.