Frustrated after not finding any shelving for my bins, I found a piece of trash cardboard and made a plan for a shelf.
David pointed out that I lacked a lot of tools to make said plan, so David helped me find a chop saw, chuck key (I'd lost mine), new bits, screws, and L brackets.
We managed to fit seven (6+hot spare) 2x4x8s in his car, putting down the back right seat and passenger seat. Dina and I got friendly in the back left seat behind the monstrously tall David who gave us an extra inch of legroom from normal, leaving us with about 3 inches.
Anyway, mission success... check it: