As for the exit ...
We are going all the way to Yosemite Valley at a somewhat casual pace (not due to the boys, due to the 2 adults - mostly the other adult :=).
Last time the boys did this trip in 14 days but we are taking 22 days this time (including a layover day at Vermillion/Mono Hot Springs).
Last Sunday we did San G from South Fork TH (~22 miles, 4700' gain). One boy the next morning ran 7 miles.
It is a harder day than any we have planned for this trip but our packs will be heavier on this backpack trip. Especially the two opening stretches (Horseshoe Meadow to Bubbs Creek, Bubbs Creek to Vermillion) the packs will be heavier as the resupply points are spread out.
One boy plans to bring a ukulele (he is also the one with ~1500 miles with the troop so I have zero concerns).
Entry July 11, Whitney July 13.