Completely understood! That's one of the reasons why I wanted to hold a meetup at Refraction - they are in Reston Town Center, which has a bus depot, with buses direct from the Silver Line. http://www.fairfaxcounty.gov/connector/parkandrides/restontowncenter.htm
From the WMATA website, there are a lot of bus routes that connect the Wiehle-Reston metro station to Reston Town Center: the 505 is direct between the two, but there are 5 other options available: 950, 983, RIBS1, RIBS2, or RIBS3. That's a lot of bus options! But like I said, the 505 pretty much just goes between Reston Town Center and the Silver line station, so that's probably the best. (All Fairfax Connector buses take SmarTrip cards as payment!)
It's also technically walkable from the metro, if you want to get in a 1.6 mile walk, hahaha!