There are 2 ways to get to the Clarion. This first way is quite twisty and roller coaster like.
Directions from Rockville are:
Take I-270 North
Merge onto I-70 West toward Hagerstown
Take US-340 West toward Charles Town (stay on US-340 for 21 miles)
Turn RIGHT onto WV-230 North to Shepherdstown and an immediate LEFT onto Shepherdstown Pike (the street signs are confusing and it looks like you are turning onto Shilpley School Road, but it's really Shepherdstown Pike).
At the stop sign bear to the RIGHT and continue on WV-230/Shepherdstown Pike.
Stay on WV-230/Shepherdstown Pike for a LONG 8.7 miles.
You will pass a few empty corn fields, go over train tracks, pass more empty corn fields, and pass a broken down barn (don't forget to wave at the cows as you drive by).
At the stop sign continue to the RIGHT on WV-230/Shepherdstown Pike.
At O'Hurley's General Store, bear LEFT and go over the train tracks. The road turns into Washington Street.
At the third stop sign (you will see signs for the Clarion) turn LEFT onto Duke Street.
At the end of the cemetary, turn RIGHT onto Lowe Drive.
At the top of the hill turn LEFT into the Clarion parking lot.
Go to the left side of the Hotel to the Conference Center entrance.
There will be carts available to help you get your supplies to your table.