Starting to think about the winter with my one stage 60" snowblower Rammy 155. My driveway is a 1" and minus gravel and about 350 feet long and about 10-12 feet wide with about a 3-4% grade up towards the house from the street. There is a bit of a crown to it where the middle high spots have essentially almost just dirt and out towards the edges is loose several inch gravel. Pictures included. How much do I need to flatten this out and redistribute the gravel and pack it down?