@mayjay, now that the championships are moving away from bowls they ought to even the playing field and have games played in all parts of the country. Fans in my neck of the woods are very passionate about college football too, but unless they shell out some big bucks to travel to a warmer southern clime to watch a postseason game, they'll never have a chance to see one of these college football playoffs.
This year, let's say they let a one loss Wisconsin in, or even a two loss OSU, or a Pac12 team (I know the league was crappy, but just for the sake of argument) they'd have to go play a playoff game in a different part of the country where they'll likely play an SEC school in their back yard.
LSU got to win two championships, both in the 2000's, both times playing in the Superdome, once against OK and once against OSU. Home field advantage? Probably. They lost once in the national championship to Alabama which was also in the Superdome.
And to finalize my rant, Wisconsin, getting screwed all year by national media, goes to the south to play in the orange bowl against Miami, an obvious home game for Miami. Wisconsin wins that game in a comfortable manor and drops in the polls! And all year, you know who's been running down Wisconsin? (I know this because I care!) ESPN. It took them to being one of the last two unbeatens before they were talked about as good enough to be in the playoff. It's a brilliant scheme for the SEC.