We did Trek #3 in 2013.
As already mentioned, we also ate an early lunch (= our dinner food) at Clarks Fork. Also tanked up (=4 liters each) & cameled up (drank up) on water. Did the last cameling up at the the last crossing of a creek/drainage.
Tooth of Time is doable that day, should your crew decide to do it … but it does makes for a l-o-n-g day.
For us, collecting water from rain drainage off the dinner fly (in a low slung, inverted V pitch) was limited in success as it didn't really rain much that afternoon & evening.
Left early the next morning to go up and over Black Mountain. At the summit, 2 had run out of water so the crew leader redistributed some water. The "trail" down Black Mountain is series of drainages with a layer of micro talus. Switchbacks didn't start until the very end.
By the time we reached Black Mountain camp, 5 of us (out of 12) were out or just running out of water. The Urraca flows right by the camp for a water source.
RE: Viable "bail out" / "plan B"
As Ed mentioned, going down from Shaffers & around, following the Urraca is a good alternative to keep in mind for your crew leader & the crew (depending on the amount of their leftover water). We had an unaffiliated "sister crew" that went that way.
NOTES:
1.) For those two particular days, the weather was cool and overcast with occasional sprinkles of rain. 2.) Our crew pace was not slow, as they had light carrying weights (Reference Point: leaving out of base camp the average, carry weight for the boys was just under 26 lbs … that's with 3 liters of water, 3 days of food, personal gear, and a share of group gear ).
Happy Trails!
EDIT: Don't worry about the youth (male or female) … it's the adults that are suspect. Worry about them ;-)