help me out guys with vast experience. is a 2 stage walk behind snowblower a total waste on a gravel driveway even if the front is raised 2 inches? will they cut through a foot of snow left by the snowplow left at the end of the drive? will the snow thrown from the end of the drive that has salt and chemicals damage my grass even worse than what is left by the city plow? we only get 3 to 4 good snows here that dont last too long, so i may stick to natures removal. lets hear the opinions. thanks all.