Steve, regarding the logistics planning -- 'taint NEARLY so bad as my Everest trip was. (Not! In my dreams . . . )
Our local newspaper columnist specializing in the outdoors/hiking/backpacking just recently did rim to rim over several days and published an article about it. I emailed her to touch base, and she responded back with an answer I'd asked regarding the ability to get Gatorade at the Phantom Ranch Cantina at the bottom of the canyon. (She said it was right next to the trail.)
She also said both snacks and beverages were available -- wasn't sure if Gatorade per se was part of the mix, though she suspected that, if not, they likely had at least powder to mix with water.
I checked
http://www.grandcanyonlodges.com/dining-712.html and see that, also, both snacks and beverages are mentioned. If cold Gatorade is available it will be preferable for me or anyone else in lieu of Gatorade or other warmer beverages. And this might be factored in one's packing decisions for their pack.
Note at this site -- accessibility is apparently not possible during meal serving hours (meals REQUIRE reservations). (For me, I should be able to get a cold drink, as my likely time passing by this place will easily be between the published meal hours.)
Also note (anyone planning this hike) - you can reserve "sack lunches" here. (You might go this route in lieu of packing some food.)
What happened to "monkie onmy back", "BryanB"? Anyone else planning near term for this hike?
