I believe they're still building on it, with so much more attractions and structures to follow.
And I don't think there are public transports one can take to go there, so you must really hire one or go in your private vehicle. It's also close to Paradise Ranch Resort so you might want to visit both places while you're in the area.
Some of what you can already see there include:
They allow weddings in the quaint Chapel inside the park, just not sure if you can also hold your reception there.