Can I use a pavilion if no one else is using it? What if I go during a week day and it’s empty? Without renting it.

During the week there really isnt an issue but it would be wise to simply stop at the office and just ask what pavilions are rented for that day. And ask what is available. Then drive around and look at them

Call the front desk for assistance but you can use the pavilion... i did one time b4 and no one said anything to me!!!

There are many tables where you can stay. If you dont pay the pavilion I think that you can't stay there. (Sorry for my English) 👍