We drove thru Sand Hollow, Bicentennial and Maple Grove before choosing Hook Lake. All of these Jesse Owens State Park/AEP campgrounds are free for up to 14 days. While most of the sites at Hook Lake do not have cell coverage we were lucky enough to find that at the "top of the hill" we were able to get both att and verizon at around 2 bars (3 to 5gb download but under 1 upload).
This campground was very quiet, lots of shade (not ideal if you are running on solar only). The DNR make rounds on a regular basis. There is a dumpster by the entrance to the campground but no longer cans at each site (October 2020).
Stayed in site 27 with a 33ft travel trailer and we're able to get level without and blocks.
Lots of hiking, mountain biking and The Wilds are near by. McConnelsville is about 20 min away for all your gas, food (Kroger) and propane (Greueys Fuel and Freed.