I chatted with the farmer again, and he's doing everything right! He asked for proof that the person was from SpaceX. He asked them to donate to the local skating rink. He's being careful at every step. He's doing a great job of dealing with a totally bizarre situation that very few people in the world have ever had to deal with.
I'll be heading up to visit him and see the junk over the weekend once I'm back in Sask, he seemed pretty confident that he'd still be in possession of it.