Finally got around to chatting with her about the hole in the wall. She mentioned that they do allow groups to go out there and that it can actually get filled up during the summer months. If you want to go that route, you will need to contact them to set that up. There is also a "fee" for using the area, but she didn't know what that would be. (She and her sister inherited the property when their father passed, but her sister actually runs the range full time). We should get a discount being friends. That said, there are various options for staying there. You can horseback, you can stay in the cabins, or you can just rough it out near the actual hole in the wall. They do have a camping area set up out there, but I don't know what that looks like. Might just be a fire ring and some leveled spots for tents.