Having worked for cities and counties for over 30 years I'd say don't hold your breath that BMW MOA or the creator even can do much about those fees. I suppose a group contract of some sort might be negotiated with one entity for one park, but trying to ameliorate the greed or need of the local governments on any scale would be futile. We simply just don't go there while in Minnesota and a few other states. At their state park prices, I would head to the nearest commercial campground with a swimming pool, hot tub, and high speed Internet.