Forget the bear spray unless you think he'd appreciate spicy food. My dads friend got mauled just south of there in sunlight basin. he walked into a clearing and smelled something dead, he thought, bear kill get the hell out o here about the same time he heard it coming and went for his gun(44mag). the clearing was about 30 yds wide. now hes not billy the kid or quick draw mcgraw, but no turtle either. That bear was across the clearing and on him just as his gun came around. Now this is 30yds or 90 ft. bear spray is good out to 15 ft if the wind isn't blowing, less if it is, your in wyoming so just assume it is. how fast do you recon that bear will cover the 15 feet. OOOONNNN the other hand w/ a pistol you can give a warning shot plus you are going to have more courage w/ some iron in your hands. might be able to bluff him.