When we were finished, we had ten vertical supports (five pairs of two, one for each side of the trailer) and five A-frame roof sections. She still needs to drill a cross-piece across the top of the A, but when that's done, we can put the vertical supports into concrete blocks on the side of the trailer, then lift the roof sections up and attach them to the vertical supports. (This is tricky, as they then have to be drilled in place to secure them to each other.)
Building sub-assemblies took most of the afternoon, by which time we were both pretty cold and it had started to rain again, so we put things away and went inside for dinner. In the evening, though, the rain cleared, and even the clouds rolled away, so we actually got to see Mars high and bright in the sky near the Moon. We took advantage of the clear weather to go for a walk after dinner over to Lyons across the river, where we walked through the neighborhood looking at all of the Christmas light displays. Our timing was good, for fog rolled in as we headed home.