Can check in to the park be for checking to your hotel room if you get be for check in?

You could check in to the park way before your hotel room

You can get your passes when ever you arrive, we were lucky- so got to go right to our room. But, if room not ready, you enjoy the park until you can get to your room. And on check out, you can stay at the park till it closes. You just have to either rent a locker, or take your stuff to your car, and just keep out a bag of your things to change into.

Yes

The Lagoon Open's From 9:00 a.m. - 9:00 p.m.You can use it as a guest with the pass immediately.