I talked to a friend who has recently started working on the hiring board at Alaska. He said Alaska will be hiring 8-10 a month for the next year or so trying to catch up. The new hires are being placed in all 3 bases.
Good luck with the decision. It's a tough one, if it was Southwest VS. anywhere else, it would be a no brainer, go to Southwest. I'm in the same boat as you and planning on staying at Alaska.