Not right next to the park but there are places on the north side of the civic center where you can.

The park itself is free to the public. I think it would be a great spot to hold a birthday party. They have some space right outside the park if you wanted to set up some blankets and such and have a little picnic out there. Depending when you go, I think you would have access to the benches and all with no issue. Hope this helps.

It should def be on during weekends

The only time during the summer that we found the park closed was on Monday's until after 1pm. There are touch sensitive sensors located on most of the water park attractions that may be difficult for your little one to turn on. With a little exploration and patience, nearly all of them will come on; the attractions seem to go off and on in a random pattern as well.