Hey kwm85
Welcome to the area, I am active duty Navy and got stationed here last march. I live in oakton which is right by reston and have spent a large chunk of my free time fishing in the area for LMB and SMB. I prefer Audubon and Lake Mercer, but I fish from my kayak so shoreline is not a factor for me. I have an extra kayak if you want to fish. Also the local rivers all have outfitters for canoes and that is in my opinion the most fun you can have fishing around here. I will be doing several trips with my girlfriend and dog this year so if you and the wife want to go just shoot me a message.
Good luck and thanks for your service.
P.S there is a group called Potomac river smallmouth club that is meeting in Vienna at the firehouse on center street next wednesday at 645, I just joined but they are a nice group and its local for us.