Oh.... You cannot camp anywhere on the Mt Whitney Trail without a wilderness permit, not even Lone Pine Lake.
However, your overnight permit is good to enter on June 9, and every overnight permit is good for up to 14 nights. You do NOT have to exit next day!!! All you do when you pick up the permit at the Visitor Center is tell the people how many nights you are staying. They keep that info for stats, and in case someone calls and reports you missing -- that is the ONLY reason.
So... adjust your time schedule. Acclimate the night of the 8th at Horseshoe meadows (or maybe two nights!), pick up your permit the morning of the 9th, and hit the trail all the way to Outpost. Summit the 10th, back to Outpost, and spend the night.
Beware of the weather this weekend!!! it's supposed to be cold!
