pictures:
http://www.nps.gov/yose/planyourvisit/bears.htm(click on "Bearproof food lockers", I thought the video was good, too)
The ones at the Portal are the larger ones.
They are open access (make SURE you lock them, test them!)
You want to leave everything with a scent in the lockers. Understand the consequences: A bear is strong. They will rip off your door, or knock out your window in a second if they think there is food inside, as easily as you would open a pop-top drink! In addition, if the rangers find your car in such a condition, they will give you an expensive ticket ($500?) for inappropriate food storage (which your insurance will NOT cover!!)
There are quite a few lockers at the trailhead, but they do tend to fill up, especially on weekends. It is much better to have stuff in boxes, rather than bags (they stack), it is much better not to take a bunch of stuff that has to be stored.
Does one REALLY need to have a cooler? they take up SO much space!
LABEL YOUR BOXES WITH YOUR NAME AND A DATE THAT YOU WILL REMOVE THEM. People tend to leave stuff, making it a garbage heap. Periodically, unlabeled stuff gets removed, particularly if it is there for a bunch of days.
