One of the best investments we made when we moved to Deerfield in 2006 was to blacktop the upper portion of our driveway. There was a good gravel base, so the blacktop went down nicely.
I should have sealed the blacktop in 2007, but other projects came ahead of that. I'm finally getting around to it now. My calculations say it will take 60 gallons of sealer to complete the job. The hardest part is pressure washing before the sealer is applied.
Only about 200 feet of the 1300-foot driveway is blacktopped. Thank goodness.