Hey Rocky, now its probably a good idea to wait to hear from someone more well informed than I. But I live in Idaho, and to my knowledge our OC laws are legal the moment anybody crosses the border. PLEASE wait for a more informed individual to give you legitimate advice. But personally I think that OC laws apply to anybody regardless of residency. Much as your CWP will be honored in Idaho and many other states.
I took my CWP class several months ago, just haven't been able to get the $100 to purchase it. When I finished the class they gave me a piece of paper that showed what states would honor the permit. Nearly every state on I-80 from Idaho to Nebraska would honor it. So its my impression is that as long as its an "open carry" state, you're free to do so =)
I even asked my father who was involved with some law enforcement back in the day. He thinks the same thing, but just for safe measures, wait for more replies =)