The best spot to camp is in your car. It'll save you time getting up and breaking camp.
Now, I posted this info a while back. It will help you making your decision.................... See below
The backpacker walkin sites are closed due to a major rock side last year. However, I think Jim maybe referring to the Ravine campground. The Ravine campground is located down from the overflow parking lot. You access the campground at the overflow parking lot. It is a walkin site built along the old road.
Below are some links:
https://www.fs.usda.gov/recarea/inyo/recarea/?recid=20704 Notice at the top of the page, is says "Closed."
Here is a link to some info on the Ravine Campground:
https://www.outdoorproject.com/united-states/california/whitney-ravine-walk-campgroundA link to the Rock slide at the Portal last year:
http://www.whitneyzone.com/wz/ubbth...ke-from-above-the-whitney-zone#Post57456 and here:
http://www.whitneyzone.com/wz/ubbthreads.php/topics/57479