This sounds like something that would play well in Missoula! It was Tube to Work Day for 19 people in the Boulder, Colorado area. Many of them had on their regular business attire. This was the day before Colorado marked its annual Bike to Work Day. The idea got started in 2008 with eight participants, so they've more than doubled their turnout. See? Don't you agree Missoula would get behind something like this? Although this time of year there may be too much concern over traffic gridlock in the rivers. :-)  DB