If'N you wait for 10 inches in depth, you should plan on moving the snow "sideways" across the driveway. Make the path extra wide. as YOU back the blade raise the blade to form the boundary.
You should have skids mounted on the blade to keep the blade 'bout 2 inches off the roadway.
Eventually you will get used to looking backwaards. Keep the blade straight.
Finally reverse the blade and finish up loose ends while going forward pretty fast. Angle blade about 30 deg.
Hope this helps.