I've got a friend who's dog with super high prey drive (successful killer of woodchucks and other smallish wild animals) absolutely hates barnhunt, because she can't get to the rats and kill them.
Check on the BHA website to see if there is a club near you. A lot of them offer clinics and/or classes. Otherwise, just teaching your dog to go through a tunnel and climb on stuff is helpful. Some people teach barnhunt like the do regular nosework, of course, using the rats instead of oils.
Thanks! looks like there are classes sort of near me, maybe ill check it out this weekend!