Thanks, Steve C, for the Forester insight.

Grady, here are our planned waypoints for the trip:
Arrive and camp at Onion Valley
1) From Onion Valley, Kearsarge trail over Kearsarge Pass, down to Vidette Meadow and camping at Center Basin Creek.
2) Center Basin Creek, over Forester Pass, camp at Tyndall Frog Ponds.
3) Tyndall Frog Ponds to the PCT/JMT junction above Crabtree, heading eastward on the JMT to Guitar Lake.
4) Guitar Lake, up to Trail Crest, to Whitney summit, back down to Trail Crest, head east on the Whitney main trail and camp at Trail Camp.
5) Trail Camp to Whitney Portal.