Conditioning? Conditioning?!
Not as well as I would like, but the 8500' on Mt Hood didn't kill me, I just did a relatively quick century with no pain, and am gaining a lot of fitness by adding an 11-34 cassette on my compact double. If my butt can stand the hours in the saddle, I have a chance.
But no matter how it goes, my Bride has promised to keep the beer cold.
BTW, elevation on the full meal deal is 16.5K, for the 100 w/o Shasta is about 12K.