Check-in was easy, there are a lot of hummingbird feeders on shepherd's hooks in front of the office so it is really nice to sit and watch them. No reception at the park, only spotty reception at times in our camper. I left my cell phone in our table and i would get some messages here and there but it was hard to tell where the reception sweet spot was. You can get reception at the visitor center and at the nature center.
The park itself is big but the campground area is small and limited. It's near the Mississippi River so you can go fishing if you like that sort of thing. I don't remember but there are approximately about 20 spots or so.
There is also Shelby Forest General Store, a quaint general store with a wonderful cook/owner. They have a good variety of items if you don't want to drive into Millington for any items.