Great area, I only wish we had more time there! You definitely won't have the area all to yourself, but it was not overly crowded during my visit and each pool/falls area was a little different depending on what you are looking for. Every area has a "life guard" or two to make sure no one does anything stupid or gets hurt, they are happy to take pictures of you, and the walk ways are well maintained.
One area you can swing in on a rope, and at one of the higher falls you can dive in from a rock near the falls and there is quite a bit of room to swim. Beautiful area! They also take you back and forth from the parking lot on a tractor pulled cart, which is kind of cool. I just hung out at the falls, but there is also ziplining available and swimming pools. This location has ample bathroom facilities and changing rooms.