OK, I'm going to do it. After researching the matter myself, reading several accounts, and getting one encouraging comment from my last post, the guns are coming with me.
Freepatriot has some very good guidelines to follow when flying with guns.
Matt Burkett also has some advice about packing your guns for your trip.
Still more advice is given by Custom-Glock.com.
Sooooo, after reviewing all the above, in addition to the guidelines published by the TSA, Alaska Air, and Northwest (thank you very much, Mark Solomon, for showing where all that information can be found), I packed up the guns in my lockable case (taking extra effort to further secure them), and have a few copies of the TSA and Alaska and NWA guidelines as published on their sites.
Less than 24 hours to go...I'm looking forward to this trip, and further educating others (this time, family members) about RKBA.