FYI, when you guys go to Hidden Falls if you plan to arrive past 9:00 pm on Friday you need to call ahead and pre-pay. If you show up past 9:00 pm on a Friday they will not let you in. We were just there this weekend and would not let anyone in past 9:00 pm, they told people who had not pre-paid they could go get a hotel room in Marble Falls. To their credit, it is on the website:
http://www.hiddenfallsadventurepark....arrival-policy
It's their land, so their rules, but I think it is pretty unrealistic to have an off road park 4 hours from Houston or Dallas and not expect people to show up past 9:00 on a Friday. When you do show up they will talk to you like you are a 2 year old and lecture you about following their rules. It's a clean and nice park, but it will be a long time before I give them another dime.