UPDATE FROM VINTAGERED -
While my husband and I were hiking up there last weekend, we also ran into a guy who said he was a friend of Todd and his family. He said that Todd and the friend had separated because Todd's knee was hurting him and he felt like he was slowing his friend down. So, he headed out from their campsite and the friend was supposed to head out in the same direction an hour or so later - the plan was that he would catch up with Todd, eventually. But, he never came across him before getting to Sheep Creek. That was the story, anyway - and that's what was on the flyers tacked up all over the area.

GUESS BY PONDER -
These are the details that need to get out. If they were in McGaffee Cow camp and left going north in section 23, eventually the hiker needs to take a hard left fork over the edge in the top of section 24. If he misses this fork, it is a GRAVITY TRAP to Log Creek. You are at the bottom and confused with a bad leg. Evedrything is up and you have no idea which trail to take, Meanwhile your buddy takes the left down to Sheep Creek and you miss each other. The good news is you have water. Stay at the intersection of LOG CR & SHEEP CR (N45.40508 W116.52366).

Best of Luck Todd - you will be found.