I know Wegmans seems to be a common starting point for many Mini Runs, so how about starting at one in Woodbridge?
http://maps.google.com/maps?saddr=Unknown+road&daddr=9101+Staples+Mill+Road,+Richmond,+VA+23228&hl=en&sll=38.630862,-77.288852&sspn=0.007426,0.016469&geocode=FW91TQIdea9k-w%3BFVVZPgId_jdh-ylHkL5JnRWxiTFwdvV4nk3uJA&mra=ls&vpsrc=0&z=9
Based on the recommendation of 1 hr 30 min drive, I suggest 07:30. Any takers?