Stephen, my wife and I endured the 30 degree start and a brisk north wind and got more deck put down. But after we got working, we really didn't notice the cold (except for my wife). Just dress warm and in layers.
My wife spent most of the time retrieving stuff we dropped over the side

which makes me happy we are on land.
First pic is Stephen (left) and me (right). The second pic is of what we've put down over two weekends.
Yeah, it's not much, but when you only have 2-3 people, it takes on average 45 minutes to get one board down. To make matters worse, the wood is warping and twisting which requires us to bolt one side down, then move everything to the other end and using spacers, work our way back to the other end.
However slow it's going, I can say that it's being done correctly and the boards are as straight as they are going to get (fighting the aforementioned warping/twisting and we found out yesterday that the supports aren't level) and they are evenly spaced.
Next workday is Saturday, Dec. 13th @ 9 AM. Hope to see a few more bodies.
Mark