I've been to WP many times and have seen one bear, paws up on a Ford Explorer on WP Rd...the owner had left some food in it.
I regularly lay my sleeping bag out in the hiker-in without a tent, fire, lantern or sign stating I'm the equivalent of a bear happy meal.
Just make sure there are no food items in your tent or vehicle. Put all that stuff in the bear lockers provided by the forest service.
