My three brothers and I have been doing an away game for the last few years (next week Bengals !!) Here's my take for what it's worth:
Miami: expected a lot of harrassment considering the long-time rivalry but fans were really mellow..think they were all retired and on valium... No hometown tailgaters to speak of, the stadium was a quarter empty until halfway through the 1st Q and it emptied out halfway through the 4th; stayed in South Beach so, needless to say, the nightlife was kicka**!!
Washington: fans were pretty cool..just good natured teasing..tailgating is basically a few miles away from stadium in sporadic business parking lots, so you end up with a bunch of mini parties, (Skins provide shuttle bus so that's cool); can't speak to nightlife as we had a cool sports bar in our hotel and hooked up with a hundred or so Pats fans who were staying there.
Arizona: without a doubt the best time yet. Fans were pretty cool albeit missing-there's a huge Pats fan base there. It was their openning day, but Pats fans must of outnumber them 3-1!! Tailgating was awesome, probably due to the volume of homies. Nightlife was pretty good as well...have a few local bars that sponsor Sat night Pats parties.
Carolina fans there are still pretty cranky about SB loss, but good natured in general. Tailgating not great..a bunch of mini parties in small parking lots..if ever go again will probably just hit a local sports bar before game. Nightlife okay since you're right in the middle of the city.
Buffalo a good time. Fans are pretty classy and no dummies when it comes to football. Felt an air of "hey we think you Pats guys are okay, but we LOVE our Bills so don't bust our chops too much". Stadium is old style and pretty cool. Tailgating is a ball. Lot of partying. If you ever go, make sure you hook up with Murphy's Pats. They're there every Pats game. Night life not so spectacular..lot of little local bars, but still a fun town.
Yeah that was long..got a bit carried away.