Flying to Arlington, VA

I am going to need to travel to Arlington, VA (Ballston area) on
business fairly often. Does anyone have any tips on the best and
nearest general aviation airport to fly into. I am looking for
something that is as close as possible. Reagan would be ideal, but I
expect that they have either prohibitted General Avaiation flights
there, or have landing fees that are not affordable (if i am wrong on
this, please advise). Other likely airports seem to be Manassas,
Gaithersburg, and College Park.

-Sami
N2057M, Piper Turbo Arrow III