Originally Posted by
Helmuth.Fishmonger
I've left cars at either end for weeks. As long as you clean the vehicle from anything that could smell tasty to a bear, you're not looking at a big risk. No food in the car, no french fries under the seats, and nothing in view that could even remotely look like food or a food container. If you bring a cooler, cutting board, etc - all that pack into a bear locker near the car for the time you're on the trail.
There were some two-legged critter problems early in the season at Whitney Portal this year with some break ins reported, but those are pretty rare.
I think in total, I've had cars on these parking lots for almost a year combined and never had the slightest problem.