I'm personally partial to shady meadows, way up by the old entrance. It's away from the noise, back in the shade of a bunch of mature pecan trees. A lot of the olds camp in that area as the sites can accommodate bigger trailers, nearby is the newest bathroom in the park, the Taj Mahsl they spent over 2 years building. 120, 118, 116, that area.
I also like river crossing. About 139-143. The sites back up to a ravine that leads down to the river, right at the first place I actually swam on my own as a kid, actually. Lots of pecan tree and oak tree shade, and the sites are fairly big and with some degree of privacy and right near the river, and some good rapids and a swimming/fishing hole. I have relatives staying there on and off through the year, usually. It's also a fairly short hike or bike to the pavilion and camp store, and the hiking trails in the hills.
I used to love the old park near the dam when I was kid but it can be crowded and noisy all summer. It's fine in the off season though.
I am as I like the live oak camping area in the "new park" they opened when I was a kid. The 350's against the river are close to an interesting part of the river with a reliable swimming hole across from the group camp and some interesting rock formations along the river.
Yeah, I've been all over that park. I know of some caves that are in the park that the park staff would probably prefer people didn't visit as the climb in is steep and narrow and you can get into some technical caving if you go deep enough, on the far side of "old baldy". Past what they call the "air condition cave", you have to drop down in them. Basically big vertical cracks sheared into the rock that just keep going down and down and down…
The there's the part of the park across the River that the state owns but nobody ever goes to. That's where a lot of the wildlife stays.
I highly recommend fall. It's warm but not oppressively hot, weekdays are very quiet with plenty of availability, and yet cool enough at night to justify a nice campfire. Speaking of night, we like to hike up to the top of the crystal cave trail after dark and lay out some old towels and star gaze away from most of the lights and up high for a full view of the sky.