Like Tim said
If you are a AMA member, you are covered while flying on your property as long as you follow the Safety Code. You dont have to insure the feild as a property owner if you are insured as the pilot. And once you show anyone that cares the $2.5mil insurance the pilot has, they will forget all about going after the cash strapped property owner. Tunips & Blood, or a nice fat insurance claim.

But as some city folks will shout, you would probably have homeowners insurance on the land, and that will get hit first. So there is an interesting situation, the homeowner insurance must pay first, then the AMA will kick in. AFIK, the AMA insurance wont go up if you have an AMA claim on it, but we all know what happens to you own insurance when you have claims. Maybe you should get the Homeowners to exclude RC Planes, then you can have No Primary and $2.5mil seconday that wont hike rates.

I prefer the Lotto Ticket method myself.