Do you have to stay there to be able to play at the water park or can you stay at another motel?

You can go to another hotel as long as you have your tickets or the bands for that day

For Indoor Waterpark you must stay

The hotel has 2 water parks, 1 indoor and one outdoors. The indoor waterpark is included with your stay when you book a room. But you can stay at any hotel you want if you choose to go to the outdoors water park not the indoors one.

You need to stay in the hotel to use the indor Waterpark but if you prefer you can go and paid a entrance to the camel beach Waterpark is another one is no thesame.

Sorry that answer doesn't make any sense

You can stay at the hotel to go on water slide or if you are going home you still get use water slide