Hey Brain,
I also have a #3 and I was having the same issue. As a temporary solution, I face the front of the smoker towards the lawn over my patio, any drippings fall on my lawn. When I don't have that option, I sometimes place a flat tray or cookie sheet on the ground in front of the smoker before I pull the shelves out.
Longer term, I plan on incorporating something more permanent when I redo my patio.