Yes the show locations are fairly close to one another. If you are lodging in Warrenton it is about 15 to 20 minutes (depending upon traffic) to the Bare Bones show site in Rectortown and approximately 20 to 30 minutes (depending upon traffic) to the Middleburg show site at Oatlands Plantation.
If you are staying at motels at exit 47 off of I-66 then it is will take less time to get to the Middleburg shows (approximately 15 to 20 minutes) and a little longer to the Bare Bones show site.
Of course this is the metropolitan D.C. area and traffic can get ugly quickly so I always leave a little earlier.