I went with a buddy and we stayed in site 16 in the primitive walk-in site.  It was a gorgeous site right on the Colorado river.  The thing I didn't realize was that in the primitive walk-in site you are in a field, with not really any privacy from any other campers.  If you are thinking that you will have some foliage separation between sites, you won't.  The other thing that other Texas state parks have that Colorado Bend didn't have was showers and a plumbed bathroom.  They have 1 open air shower but it is closed during the winter season.  The bathroom's are simple outhouses with composing bins.  The shop also doesn't take credit cards, and they don't have the firewood vending machines you can access after hours, so if you come one after the shop closes, you will need to bring your own firewood.  We did the Spicewood Canyon trail that has some amazing views from the top of the ridge.  We hit the last mile of the Lemon Ridge trail that then dumped us on the the river trail that created a nice 6.5 mile loop.  It was a good hike that they have listed as "Challenging" but hasn't bad at all.  The north end of the site has the Waterfalls and from what we were told from some people at a neighboring site, that is were a lot of the day use hikers were.  Overall it was a great camping trip in a gorgeous part of Texas, there were just a few things I wish I had known going into the trip.