This is exactly what I did! I had a small closed loop trail of about two miles that I would practice on once I left my parking lot... then moved up to the six mile trail that had hills and various other challenges to it, but still a closed loop so no cars, but I did have to content with walkers, bikers, and dogs on leashes that really freaked me out as I visualized small puffball critter meeting spokes on a bike wheel every time I passed one.
Shannon