Sorry to hear that.
It happened to me (remember-oct/19 lost that permission-I didn't ask for visitor permission but it was because of silo bin opened and he lost product.) He owned the biggest insurance company in the city-so that lost is still vibrating in the farmer''s world. So that was 250 acres-8+ homestead sites that I had located.
It hurts-been working the back channels through others to get it back-but from an insurance point of view just get a cheap liability rider on your home insurance policy.
I looked into it a few years ago and it was peanuts to get it for maintenance folks that were doing some work.
I'm thinking of getting a policy for myself for the harder to obtain permissions that are afraid of being sued.
(Most of my permissions own backhoes-so they can just bury the issue.

)