Do not tell any one but that is one of the nicest parks in Texas. We already have reservations for the Fourth of July and a few days before. (we have a 23 ft trailer also)
With a trailer Big Pine section (has 10 sites with water /electric and sewage) is the best choice, otherwise Dogwood has 15 water/ electric sites. It is not a big park which is a charm
Its a nice small secluded park, no noisy boats, nice trail around the Lake and in the trees, there is a short video linked below.
TPWD: Pineywoods Videos
Enjoy, if you need more PM me