You yourself can also help your guide by being prepared to hunt as hard as possible. Guides have to know your physical condition, and how hard your able to hunt. Especially a western states Elk hunt. The better shape your in, the more you'll be able to hunt, and increase your chances to do whatever it takes to get that Elk.
Far as your gear, I'd bring your own binoculars, and range finder. Its your hunt, and it only helps your guide if you can involve yourself as much as possible. Both you glassing helps to find Elk over you being solely dependent on your guide. Bring your own range finder that your used too if have one.
Just remember its your hunt, and a guide guides you. But the more your capable of being involved that just helps the guide to help you!!