A police officer has the right to pull you over just to check to see if your license, ins., and registration are all kosher. The CO has the same right in the woods while you are hunting, or doing anything else that would constitute you needing a lic., etc to do thay activity. If you are not hunting or participating in any kind of activity that would cause you to need a license, tag, etc., you don't have to show them anything. There is a fine line there that many people don't understand. Its really not that confusing when you really think about it.
Most of the time it is best just to cooperate and allow things to go smoothly without any problems. Remember, they are law enforcement and are approaching people they dont know who have guns. They don't know who hates them and who likes them. Just show them respect and they should do the same.
If a cop pulls you over just to "check your papers"....he has blatantly disregarded the constitution.