Black Hills can be hard to find cheap or free camping during busy season. Great free camp down a gravel/dirt road with cows on both sides and one in the road (it moved eventually). Go a good ways down the road and up a hill which did have a couple of spots that I would be Leary of if you have a low to ground vehicle. We stayed in the first spot once clear of the trees, and while on a slope, it was a fantastic view. Our neighbors had made it towing a full size 5th wheel travel trailer, so it can be done, but I wouldn't try on a muddy road day with a huge trailer. Too risky. Still we camped on top of one of the highest mountains in the Black Hills, for free. It was fantastic until about midnight when the rainstorms came and our old tent had a catastrophic failure. We nearly froze from being fully soaked. So no second night for us, we had to push on, wash and dry everything, and buy a new tent to continue our travels. It was a great camp tho. But I recommend a bug canopy for just chilling in, and go ahead and invest in a good ground tarp and throw one over your tent as well to keep rain from soaking thru. You will thank me, and be a little warmer. Happy camping.