I have a 1.25 mile track on our place. I used a Cat 931C (~D4 with a 4-way bucket) to build a lot of it and gather dirt for jumps, push large trees and bury debris. That being said, once it's built, I found that surface maintenance is easier handled with the tractor pulling a disk and then a do-all for finishing.
Rebuilding jumps, berms, etc can be handled with a large CTL. The advantage is I can use the correct attachment for what I need to accomplish. The bucket for moving dirt, a 6-way blade for shaping, I built a limb saw for cutting overhangs through the woods and the grapple is perfect for picking up downed trees and limbs. My next project will be using a dirt pan to get some more dirt moved and help with drainage in a couple of sections.
If you need a dozer, rent one. No denying they are fun to run, but unless you have a lot of other uses, they end up sitting once you are done.