I not sure if its still open but their was a lady on the Putnam-Jackson co line that had pens,also heard of one around Portland but don't know for sure.I can find out about the one in Putnam if need be.
Ernie Austin starts them if not mistaken ive never used him but hes a name who comes up when someone asks. Theres another guy who has a website, ill look for it and see if he starts them then post link its was only a few dollars a day but with hunting/trialing season going he may not right now. I think hes around the winchester area.ill post link asap