Real talk; I'm a bit motorcycle/car-brained myself. Always ride EVERYWHERE (or take my partner's car if I ABSOLUTELY must), even short distances. I also did some tech work at DCA a bunch of times and would just ride there.

I took Metro to DCA for the first time about a month ago; I'll NEVER drive there again. 1-2 trains and you're there. Right in Terminal 2 (I believe).

I get the comfort of having your own car and being able to just get in and go, but SERIOUSLY consider Metro, at least to get to the airport. Its TOTALLY worth it, and WAY cheaper (parking fees, gas, agony being stuck in traffic, etc). Hell, park your car near a Metro station so you don't have to walk home or whatever.

But take Metro to go to the airport. From one carbrain to another, its worth it.

Good luck!