Cherokee park area. 287 to the Tie Siding exit. Go down dirt road and when it branches off, veer to the right. (Boulder Ridge Rd). That leads you to camp spots, tons of easy and fun riding and exploring. Trails are really varied from easy, hard, rock gardens, dirt roads, 2 track and single track. Really fun area and NOT crowded or even busy. I towed a 25ft toy hauler through there MANY times in the past several years. Best part is that it is not crowded and full of dipshits. Many weekends we were the only ones there. The road can get narrow, kind of steep for small sections, but again, I did it with an F150 towing the 25ft hauler weighing #9300. Didn't even spin the tires and was never too narrow to be nervous.
Avoid the Cherokee Park "campground", it is not what you are looking for and is where you end up if you veer left where the road branches off. You will see it and it will make sense when you google map it.