Reply to zootownjeepguy:
Good luck!
Here in the 'Zoo there was an old Case tractor on an abandoned refinery property that the City took for back taxes. I heard that someone tried going through the proper channels to buy/remove the tractor but the EPA determined that the tractor was "Hazardous Waste" and it was removed as part of the contamination abatement process. Some people just take their jobs way too seriously. Who knows what ever happened to it...:noidea::noidea:
How would anyone even find the original owner? It's not like these things are registered. If the local guy is willing to work with you, definitely stay with him because as soon as the gov gets involved you are in for a mess.
I would see if you could find the previous lessee/owner of that parcel, the ranger might have access to that info.
Offer to place a public notice in the nearest major newspaper, with all the ID info of the D4, and the APPROXIMATE location, for 30 days.
That would be due diligence on your part, and might be enough for him to let you load 'er up!