I'm sorry, the name of the place is Grandview Campground. Service station across Mitchell street from it. Closer to the Battlefield than the 7th, but does have some permanents. Not sure how to post a picture from Google maps. We've been to the Battlefield a couple of times. Sad place when you figure what went on there and see where folks died. Museum is very interesting.
I guess the time of day you arrive is the key to which to see first. I know the parking lot for the Battlefield and cemetery (there is a national cemetery also) gets pretty crowded and you cannot turn a 40 ft rig and a towed Jeep around in it with the crowd - believe me, I KNOW! ;) ;)
https://www.google.com/maps/@45.7390766,-107.6134282,3a,75y,298.63h,88.08t/data=!3m6!1e1!3m4!1sYgAlVLastt9jIJatyP8o9w!2e0!7i13312!8i6656