Pete:
I beleive you travel south on Plank Rd, and turn left of Rocky River Road. The driveway is on the right. The had a sign by the Drive the last time I was there.
Here's waht I copied off the web site
" From the North, Go straight onto Plank Road for about 1 Mile to Rocky River Springs Road. Turn Left onto Rocky River Springs Road.
Go about 3/4 Mile and turn right on a gravel driveway, LOOK For RBA Sign.
There will be a gray vinyl house on the corner.
Barn is about One Quarter Mile from the Hwy. "