This massive, desolate, and remote National Forest OHV / Wildlife Management Area area very quickly became our favorite place to ride. Hardly any trail traffic, absolutely beautiful forest, massive hills & steep rugged terrain, with a good mix of fast-flowing trails and challenging steep rocky technical sections. This is about as good of a remote national forest wilderness type trail riding experience as you will find in the Eastern USA, I highly recommend it
Although as the Forest Service website says, beginners must absolutely be accompanied by experienced riders, due to the steep challenging and technical nature of the terrain. Much of these trails are not terribly beginner friendly, although a lot of sections are (6A & 7A are probably the easiest, perhaps 7 now that they've finally done some tree clearing maintenance after 3 years).
Here's a photo of yours truly, last July 4th, 2022, after running an unmarked trail off of trail 4 near Sugar Creek Trailhead, that takes you to the top of Lucindas Lookout Tower Rd where there are a few really nice graveled campsites 1.6 miles ride from the Sugar Creek Trailhead / restrooms.
This point is a 900 ft elevation climb above the creeks at the base of these hills directly below (hence why it was the former location of a fire tower). The terrain regularly at Redbird Crest typically climbs anywhere from the creeks up 300ft, 400ft, to upwards of 900 ft between the creeks up to the peaks (lower elevations up to the higher points on the ridges) .
Here's a dreamy picture of some of the official single track riding to be had:

This is the favorite roadside camp spot on Sugar Creek Rd at what the locals call Old Woman's Rock, looking from fire pit towards the road:
same spot but looking from the tent/road side back towards the forest where there's a small creek behind the campsite:
I've found that most videos online on YouTube etc don't do these trails justice whatsoever, so I tried to take a few photos documenting what the video is don't show at all, a lot of rocky, steep, rugged, and beautiful terrain.
Here's a KDX200 video (not mine) from January 2nd 2023 (yes, it's rideable most of the winter as it's far enough South & not high enough elevation to get heavy snow). The rider is starting from upper Sugar Creek Rd onto Redbird Crest #801 trail section 4, and onto some unofficial singletracks, down to the lower section of Sugar Creek Rd at Peter's Branch Rd:
https://www.youtube.com/watch?v=17CvIFYy93U
So many of the videos on YouTube just show a lot of faster easier sections, but I swear there are TONS of steep rocky technical sections here on the official trails, all over the place... I think a lot of video creators just post only the sections where the had no difficulty

Trail 1, not far from the gravel access road entry into the forest: Trail section 1 climbs nonstop, sidehilling up a steep, gorgeous, and rugged ravine nearly 600 feet of elevation all in one shot over what seems like an eternity (8/10ths of a mile)... Trail 6B right off of trail section 6: There's free camping at 2 of the 3 trailheads (Bear Creek Trailhead is not advisable for camping, but absolutely has some of the best trails around right out of the gate) and a few dispersed roadside sites throughout. There's also an RV / ATV Campground down US421 a short drive, connected through a maze of logging roads adjacent beyond the National Forest that eventually take you to the edge of the forest boundary where you can pick up Trail 6B.
There's also 6 RV hookup campsites with indoor running water restrooms (& showers?) in front of the Stinnett Community Center just down the road from an intersection of Trail 7 to the North end Trail 8/9 to the South.