I lived just outside the refuge in Cache OK for over 40 years. I started putting in for the elk hunt when the drawing was held at the Cache high school gym. I volunteered and worked the hunt for 6 or 7 years until my first knee surgery. The walk in hunt is a fairly new addition to increase hunting opportunities. Be prepared for some nasty walking conditions. Lots of rocks hidden in the grass. We used to say there are 3 types of rocks, sliders, rockers and rollers. Wear well broken in boots with strong ankle support. Great glass is a necessity along with a good rangefinder, a gps is a good idea too. Get up high and glass early and late. The elk will be low in the morning and make their way up into the draws. The evenings will bring them back down onto the grass flats. It's much like hunting out west except for the altitude. The oak brush is thick and noisy to navigate. The acorns will be gone by the time you hunt but the brush still provides good bedding cover. The elk are the real deal, lots of really nice 6x6's. The biggest one I've personally seen and help pack out was a 7x8 that was a true monster that green scored in the 360's. Expect shots to be under 500 yards. The most popular calibers were 7 mag, 30-06 and 270. If you've never hunted elk, remember to keep shooting until it's on the ground. They can go a long ways even with a good hit. I've had a dozen friends and family members get drawn and stay with us but I'm still waiting on my turn. Hope this helps.