Hi folks - thanks for the great info!
Sounds like staying in the Sheraton Reston may be a gamble for driving times, but I think it may be worth the gamble.
If I can get a Priceline hotel in the $50 range out there vs. $159/night in town, that's a big difference. And when you consider I want 2 rooms for 8 nights, that's a lot of money.
Anyone else want to chime in?