Another club in NoVA is the Mount Vernon Amateur Radio Club (MVARC). Their website is " http://www.mvarc.org/
". They meet over by route 1. Guess that is the other side of the county for you. The club repeater is on the George Washington Masonic Memorial in Alexandria. Probably the best repeater site in the region.
One things of note with this club is that they do free testing once per month.
-- KG4NMC (Delbert)