The Academy of Model Aeronautics is the national level association of modelers. The Oconee Eagles is AMA charter club #3739. The AMA provides liability insurance for flying activities, a monthly magazine, and an outstanding website.
This area is not as far back in the sticks as you thought. Tripple Tree Aerodrome, less than a 2 hour drive from here, hosts major national level events such as the Joe Nall fly-in.
Another major event close to us is the Southeastearn Model Show (the worlds largest model airplane flea market), held in March each year in Perry, Ga.