> Anyone care to take a guess at the likelihood of snagging a walk-in at WPT or WPFC at 4pm on a Thursday August 9th timeframe?
Chances are pretty good for the hiker walk-ins. These hiker walk-ins are NOT the reservable camp sites that you drive to and park. They are right by the main hiker parking lot.
I've ever seen anyone say those spots were all full. Since you are getting up early to hike, they're the best, especially if you camp light -- NO tent, just a pad and sleeping bag. Makes pickup before leaving quick and easy, since your car is already parked in the hiker parking area.