Dave Canterbury on the Remington 870. Not that I needed to be sold on it but still interesting. He talks single shot shotguns a lot for 'the woods' but unfortunately this mythical woods where there are lots of game and no people is just not so. Certainly there are areas with few people but almost none is a stretch. With very few exceptions (off the top of my head rural Alaska, a good chunk of Wyoming and the Dakota's outside of the few cities) the US just has too many people for them, and the resulting security issues not to be a consideration. If you can possibly afford it a pump shotgun is a better all around choice than a single barrel.
Anyway a Remington 870 with a long barrel and a short riot barrel is a heck of a combo.