@Yueming,I will do day hike this Saturday myselfe,and this is my first time do Mt Whitney.

can I meet your group at trailhead at 2am?
are you going to take the Old Trail (starting in back of the Portal Pond) to avoid having to cross the North Fork of Lone Pine Creek?

I have reserved a camp site at Whitney portal for Friday and Saturday night,if your group need I can share my camp spot.

Thanks

Jack