You indicate in your first post that you can't travel an hour to do hillwork weekly, but don't underestimate what even just a few sessions on those hills will do for you. Even if you can't get down there weekly, it'll still be very much worth while to get there when you can. I live in a flat area and, when I was purposely training for out-of-state hilly rides/tours, I was only able to hill work here and there. That here and there helped tremendously though.