For bouldering, Mountain Project is probably the most complete database out there for the Wildlife Refuge. This guy Ryan was going to make a guidebook, but he has some info in his old blog: http://oklahomabouldering.blogspot.com/ There used to be a gear shop in Medicine Park, but I can't imagine it is still open. If you are going through Oklahoma City, stop by Backwoods or one of the climbing gyms for a rope, you may even be able to convince an employee there to show you around the refuge. If you are going solely for bouldering, I would suggest Quartz Mountain, the problems are all in a much closer proximity, easier to find and generally of much higher quality. A lot of them are even covered in the new guidebook! Like Blakevan said, OKC Climb can be helpful too.