I have a driveway that is clay at one time they had put round gravel over it. It is great as long as it does not rain or snow. When it gets wet it turns to MUD! I have graded it so that I have better drainage now,however it still is Muddy when it gets wet. I want to put the gravel back over the drive, but I need some kind of a base to keep the gravel from being pushed down and out. I feel I have the material I just need some Help with how to prep the base.