Big freezer or whatever you can manage to get into your home.
Make contacts with friends, family, acquaintances and restauranteurs to take any you can't fit in the freezer. I can't advocate selling it for regulatory purposes, but getting something back for the money you spent on it would not be unethical in my views. I don't know what the regs are on non-USDA meat for the restaurants, be sure to ask if you pursue this option. I like the donation angle also, but I'd share with my friends and family first personally. But that part is easy for me, they all live pretty close.
Also, you might call a butcher shop in your area, or MT, for suggestions. They deal in meat, have the room, and are usually more than willing to help someone out. The game processors in MT will likely have many contacts for offloading the extra also. You should call your outfitter and ask a few questions. They will surely offer you some local businesses to contact and work out the details if they don't handle themselves already.