If were going to PB1:
From Arkan, Take the same route except don't turn right into the Pa He Tsi area on 54 E, keep going through Osage Beach to HWY 42/134, it will be on your right. Turn right on 42 / 134, and when they split turn right on 134 and follow it to the boat ramp. Not that far away from Pa He Tsi if I remember right, but it's very close to the campground.
I'm heading down this afternoon to ride, not sure if I'm going to PB1 or Pa He Tsi.. if anyone else is out riding, call my cell. 9139088736 (Matt)
If you have GPS, most of the time they will take long/lat.
Here is PB1
38.073996,-92.575951
Pa He Tsi
38.132666, - 92.645559