We stayed one night at Calhoun Falls, SC site 86. The site is the first one in the second grouping of campsites directly across from the camp host. Site 86 is a pull-through. There are 12 steps down to a lower level picnic table and fire pit area. There is a short path down to the water. 

There is 30amp power available as well as household style 110. The 30amp power seemed to be a little finicky. 

The camp host's dog barked for several hours after our arrival which was not very relaxing. During the barking, the camp host decided it was time to run a leaf blower for a while. So we decided to take a walk. 

We liked the walking paths and the public fishing pier. 

There is a rail line that crosses the lake. We heard the train horn a couple times that night. Dogs, leaf blowers, trains … not the relaxing weekend we had hoped for. 

Security seemed a bit lax. There were several cases of motorcycles and show cars, maybe lost boaters come in an out of the camp area at all hours. 

The dump station was in bad enough shape that we did not feel it would be in our best health to use it (see picture). 

We probably will not go back even though this is not too far from home.

Most, but not all, sites have lake views.  During the time of our visit, only one area was open for camping (sites 25-58).  We picked site 42 out of a handful of available sites, all seemingly equal.

Apon arrival we discovered sites 42 and 43 are very cozy with each other.   A family with a large number of small children was tent camping in site 43, basically using site 42 as a spillover (literally, the site 43 water is physically located inside the edge of site 42, and as children were getting water, this created a small muddy run towards our trailer position).    Suffice it to say we were pretty displeased with the proximity of the neighboring camp site.   See picture.   On the positive side, these 2 sites would be a great setup for a multi-family or group camping event.

We walked the next branch of the campsite which was not open, and found that sites 3-24 are much more to our liking with regards to elbow room and privacy.  Our next trip to this park will be on that branch.

I would recommend this park with the caveat of doing site research ahead of time.

Camp map is here:

https://www.sas.usace.army.mil/Portals/61/docs/lakes/hartwell/PlanaVisit/TwinLakes/FY13TwinLakes.pdf