Has anyone been? Thoughts? Tips?

We are thinking about taking the kids for spring break. Ok, before anyone freaks out here is some relevant info: my superpower is I can travel to most places an American would want to go for free or nearly free. Problem is I can’t always do it when everyone else wants to travel. So, when things like spring break happen I have to look for places where most folks aren’t going. Second, the ticket prices are remarkably low and the hotels in the area are reasonable. Third, they are supposed to be great parks.