My sister, brother-in-law and now 5 month old niece live in Seattle. I've thought about trying to fly up there from Charlotte to take in the game (and visit them as well, I guess) but like others have said, the tickets are too damn expensive right now. As we get closer, if the prices come down, I might still try to swing it.
No, that's just for purchasing them as PSLs. If you get them off of stubhub then you are good to go. Also, if you have some type of physical condition that prevents you from walking up the stairs, if you go to the Guest Relations booth they can switch your seats to WC seating if they have them available (but only 2 seats so don't expect them to move your whole party of 5.)