Just my opinion Danny,Forget the letter.First thing look around find out where and who's land the rabbits are on.No point getting permission where its crap. Smarten yourself up and go see the farmer in person, ON YOUR OWN, and offer an exchange,ie help at what ever you think you could do.Summers not far off crops busy time for farmers.Ferreting better than guns but once your on who knows. Good luck to you.