In our extended, multi-week trips, we always carry one or two large ice coolers with food, in addition to what we can carry in our Pod refrigerator, making us virtually self-sufficient.   My only caveat with your suggestion regards ice cubes.  We have found that block ice last longer, cools better, and is easier to manage than cubes.  However, commercial block ice is usually manufactured from ice cubes that are pressed or frozen into blocks.  Commercial blocks, therefore, don't last in the cooler as long as block ice that you make at home in your own freezer.  We make ours by freezing water in empty milk cartons or even larger disposable plastic containers.  

Of course, having a good cooler, such as the Yeti, preserve block ice from any source longer.  We found that cheaper Coleman coolers can be brought up to Yeti standards by duct-taping or gluing insulating closed cell foam insulation to the cooler sides, bottom, and top.  It isn't pretty but it works.

I would fly into Bozeman, MT (my town) which is served by most of the major airlines in this part of the West.  Your daughter probably can catch a direct flight from LA of San F. to Bozeman, but Alaskan airline routes through Seattle, I believe.  

Thanks.