Maybe here is something not suggested yet.
You might consider building a financial case against the neighbor. If I were to do this, I would decide upon a land lease fee chargeable on a monthly basis. It's your land-- you can choose the amount. Then calculate a pro-rated amount of property tax. And a calculation to restore the land to original condition when the lease is done. And a fee for periodic monitoring of the area. Plus I would contact your insurance company to ask about additional coverage necessary to cover a 3rd party running equipment on your land. $2M in liability coverage out to do it.
With all of those added up, I would approach the neighbor with an offer to lease. Present the monthly cost, which starts TODAY. Ask the neighbor to sign a lease and a waiver of liability. And provide proof of their own insurance and have him add your name as an additional insured on their policy.
The chances of your neighbor signing this is, of course, low. But, you are building a very strong and verifiable case for future collection of damages. I would have your presentation witnessed or send it certified mail. And I would follow up, each month, with another statement detailing how much is owed, plus collection charges of course.
If you have to press your case in court, you then have some excellent documentation to work from. If this ever went in front of a judge, I presume the decision would be very favorable for you-- if all of us know all of the key facts based on just hearing your side.