Oak Mountain State Park is a fantastic destination. However the campground isn’t the best. Loop A is better than Loop B. Loop B has limited trees. Both loops have old bathroom facilities. They are clean but old. Loop B RV sites are oriented so that to sit around the fire you are basically sitting on the camp roads.
Tent sites are all back off the road into the trees. Almost all are nicely laid out. Camp hosts and park staff are great.
Trails are worth the trip on their own. Challenging and fun.