SFLOGGIE:
I am an ATV owner, an ultralight aircraft pilot, and a builder and maintainer of ATV trails in woods. I have done a lot of aerial photography from an open ultralight. I want to say this carefully: You will learn almost nothing about the trails and poaching and trespass from any aerial platform. Whether you are in it, or filming from it, or remote piloting it, you will be too high, too fast, too low of resolution, to be able to tell damage from groomed trail, or fence posts from hunters. When you go up 300 feet, you almost completely loose depth perception, and small details like foot-deep ruts in the ground are indistinguishable from flat dirt.
If you want to know what is going on in there, you need to get your boots muddy.
That picture of the ATV "damage" that you showed -- That's not terrible, I don't see any evidence of erosion (loss of soil). The trail could possibly be 500 years old. A bit of landscape rake grooming to level and fill the water puddles there and you'd have a super nice access trail for your own use on your tractor or ATV for your inspection/enjoyment tours. If that humble trail beginning was not there, you'd have to fight your way thru the bramble and vine to get access.
Stop fighting it and start using it. Notice I did not say "clear cut" or "burn it". But study the trails, their direction, re-route where needed for erosion, put in waterbreaks to keep water from following the trail, establish trails to every remote corner for your use in maintenance of the timber, wildlife viewing, general security, picnics, site-seeing, downed-firewood harvesting, etc. If you don't actually use the land, and enjoy it, what's the point?
My 0 cents' worth for ya...