Is there year round camping, and if so what is the yearly fee.

Not that I'm aware of

Between April 1 and August 31, campers can stay a maximum of 14 nights at Lake Greenwood. After the 14th night, they must vacate the park for 7 consecutive nights before returning.

There are places on lake greenwood but are private owned.

Unsure but you can call the rangers station/ check in bld.