Thomas Woods campground has some great sites, particularly the tent sites. Many of them are set off a short distance from the parking area. I stayed at site 30 which was less than a tenth mile from the parking spot. There are no trash cans at the site, the dumpsite is near the entrance. Most of the roads are one way so after dropping the trash off you must drive all through the campground to get back to your site. The site itself had plenty of room and privacy. The woods are dense and block all views of the neighboring sites. Unfortunately, I think some people think if they can’t see you, you can’t hear them. Every site has a raised pad for a tent. This was very nice. I did track in some of the small gravel into the tent, though. It looks like kitty litter. Not a big deal. It was nice sleeping flat and not sliding off my sleep pad.

Near Marengo Ridge is a bike trail called H.U.M. Trail. It is only 3.5 miles long. From what I understand is they lost funding for the project. The path is paved and offers a scenic forested view. The hiking trails of Marengo Ridge are the true stars of the area. I walked for almost two hours and still didn’t see them all. Some of the trails have wide paths of grass while others are single-track dirt. 

As other reviewers have written, the mosquitoes are insane.  Bring plenty of bug spray!

My website:  https://www.lost13.com/camping/2020/7/13/marengo-ridge

My video:  https://www.youtube.com/watch?v=lh4TzLzf\_PY&t=1s