I think I beat you to it. To add to what I said above, I was a little unsettled at first because I couldn't find a spare tube for my bike before I left the house. I just moved and still have a lot of my garage in boxes. That said, I've never had a flat with Schwalbe Marathon XR tires and didn't think about it again after the first few minutes.

Great ride and the commuter gathering was cool to see but I couldn't hang around long.