I feel for you.
Some neighbors can be a real pain.
I have about 110 acres of forested land surrounded by Forest Service property except for a small border on one side, and a neighbor that has two acres that abuts just one corner on the opposite end of my property. My public access crosses this one neighbor’s two acre parcel. This access is a legal public road. This neighbor never did like me because he bought his two acres shortly before I bought my large parcel about 30 years ago. He wanted my acreage, but couldn’t afford it. This guy complained the first time I select cut timber, even though I replanted about 2000 saplings, and kept the largest trees. He harasses me and other neighbors to the point he has been arrested for harassing a good friend of mine, who is the local fire chief, while he was responding to an accident scene. All my neighbors, even though none are real close, are wonderful except for this nut job.
I’m lucky since the Forest Service surveyed and marked all of the perimeter they had near my property.
A survey will clear up any legal issues. It is money well spent. As stated above, most loggers won’t mess with small parcels. Also, the distance to a local mill will also affect the lumber value.
Good luck with your situation.