Why would anyone need to kill a moose while camping?? First of all, if it is not moose season, you'd be going to jail for a very long time for hunting out of season. Secondly, you'd be killing the moose without a hunting licence which would land you in jail. Thirdly, I could be wrong, but I don't think handguns are considered hunting equipment. And fourthly, moose aren't dangerous!
Bears, on the other hand, if you can prove that one was attacking, might be a different story.