Have a friend coming down the end of this month for The Belgian Terv National. Herding trial is in Berryville. She will be coming from Silver Spring.
On a Saturday morning at a reasonable pace since she will be towing a camping trailer how long should it take for her to get ot Berryville, VA approx 1 mile from the turn off for Summit Point from Rt 7. Is it quicker to go Rt340 or Rt81?

TIA

Dave Apker and the collies.