I've gone to the game the last 2 times the Saints visited Jerry World (can't make it this time) but in both cases there was a good 65% black and gold. I'd say the Saints fans will represent.
The stadium is beautiful , but I didn't like the football atmosphere. Too big and I ended up looking at that big TV more than the actual game. We paid for some good seats but it still seemed to far away. Needless to say , I probably will not go to Jerry World again, unless I get free tickets or something like that.
Of course , I am bias ,but IMHO, the Super Dome is one of the great football experience.
But for away games, I would say Arrowhead is a fun experience.