Red Top Mountain State Park is beautiful and Lake Allatoona is large.  Campsite 50 is a premium tent only walk-in site (a few dollars more).  It sits on a point that sticks out in the lake.  There is no shade or tree cover, so it's not "private".  There are 3 other sites near by on the walk-in area and there are no boundaries or barriers between so your neighbors are in full view.  There is no electric near the tent pad, the electric pole is 150+ feet away near the parking area.  You probably could run 175 feet of electric extension cord... but it would have to run past the three other sites... so don't plan for electric.  There is water right by the pad with a ton of pressure.  The tent pad was large but extremely hard to drive tent stakes into... smaller stakes worked better.  The bathhouse was an uphill hike probably 300 ft away but was modern and clean with hot showers and good water pressure.  The park is clean and scenic.  The staff is very courteous, friendly and helpful.  There are plenty of opportunities to hike, fish and boat.

This park is about 30-40 minutes outside of Atlanta right off of I-75.  If you are in a tent... you will hear I-75 traffic all night so keep in mind, that while it looks like country, you are not deep in nature... the drone of the highway will remind you.  There is a train that blows its whistle that will wake you up 3 times each night and also remind you that you are not deep in the woods.  The winding roads through the park outside the campground also seemed to be very popular with motorcyclists who like loud pipes.

The name Red Top Mountain is derived from the red soil in the area that was popular for the mining of abundant iron ore.  But don't look for "mountains" here... you have to travel further north for more dramatic elevation.  

Overall, a nice park, pretty scenery but not as secluded, quiet and relaxing as expected for tent camping.