Wow,
That is a huge amount of work you are doing with that little machine. I hope the soil is easy digging. How many hours do you have into the job so far?
I have a trail turned road through the woods going down about 1/2 the length of the pasture starting across from my equipment building along the edge of our property. With all the twists and turns through the woods, it is about 600 Ft. I get a good deal on quarry tailings and have spread two tri-axle loads of this grarvel on over the orignal earthen trail. It packs very well and is so much nicer of a ride in the RTV now. The "road" tends to erode much less from rain runoff also. I used the same material on the horse path from the pasture to the barn and as a topcoat on my 1/4 mile driveway.