Just my 2 cents. I live in Wyoming and hunt the area a lot. If you are going to do a backpack trip, you will certainly need the equipment. The lighter the better. Water is a big problem and a water purifier is a must. Also, you will want to totally bone out any animal you take, and you need to leave proof of sex attached. Most game wardens are good to deal with, but some can kind of give you a hard time at the game check stations. I've hunted both from the Grey's River and also done backpack trips. If you want to touch base, email me, I would be will to share what I know. Huntertj is also a good contact, he obviously has an in with someone, he draws a tag yearly.