I think it was last year, someone posted about grinding the knurl down on the hinge pin so they easily slide in and out. Then welding on a washer to the top of the pin. This way you can pull on the pin and they pop-off.
I did this, and found the top pin would not slide in and out because of the shape of the door. I made the pin slide in from the bottom. I am using a safety wire to hold the pin in though. /forums/images/graemlins/tongue.gif
I like the bolt idea better...