I just had about 17 trees removed. Where a few of them were and had fallen there are big.divits and some erosion. We live on a hill and just bought.a new tractor. What's the b est way to fill the holes/divits? Someone at work said use #20gravel as a base and then put top soil down, is that a good idea? The area that I'm trying to level and fix is about 30 feet long,10 feet wide and dips down about 11inches in places, please help!