If you have a membership how do you use swimming pool do you have to make reservations

It is my understanding, as a thousand trails member, that you can go as day camp too and use all facilities as a member.

Sorry I do not know the different memberships. I work in the park at times. Compared to other parks Thousand Trails is one of the nicer parks, clean, safe, etc.

There are many different memberships. Some memberships allow you to use the park as a day-use facility. Some memberships don't. The best thing to do if you are a Thousand Trails member is to call member services at the 800 number and ask them. If you're staying there with your RV or tent then, of course, you can use the pool.