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I got an overnight permit for Mt Whitney for a party of 5 in Sep 2020. I need to answer 3 questions that I have highlighted in the screenshot of the permit.

Q1) How many days do hikers typically spend? Is this dependent on the route I take? Where can I find info on all the things I can do in the trail?

Q2) How do I choose the campgrounds for each day I stay in the trail?

Q3) How do I choose I exit point?

I understand the questions I have asked may be subjective and may come down to hiker's preference. But i still want to get your opinions.