I can help you with Shiloh.
Next to the park there is a small campground. I have never stayed there so not sure of things but its very simple but has all hookups, I think.
But a few miles away, maybe 8 or 10 miles, there is a TVA campground on the Tennessee River that is nice and very pretty. This park has water and electricity and a dumping station. Also close to the river is Pickwick State Park witch is ok, but not very pretty.
My advice would be the TVA park for the beauty of it.
If I can help you more just let me know.
