I'm lucky enough to have 4 blue limestone quarries within 3 miles of my place. I put the geoGRID down on a wet spot and filled it in with gravel. Poor man's road. Haven't lost any due to sinking.Plus 1 on all of that. A 110 foot long and level driveway is pretty simple work. Right now around here I can't get the stone for that - more like $500 for a tandem load delivered.