There are so many vehicles in the parade that aren't even street legal it's ridiculous. I wouldn't worry about the pipes. Before the parade folks decided stunting was teh debul, even the cops were cheering it on.
You will need to have a valid insurance card on you for the parade, marshals may check for it. Beyond that, just don't be a retard and plow into other bikes or the crowd. It's a lot of fun though!
We'll have some drinks and stuff in coolers in the truck, and we can fit a number of kids in the back if they want to come but don't want to ride on the bike.
If it's a ripping snowstorm I think they'll postpone it, otherwise we go! Usually it's warm and nice, but even if it's cold, the heat from all the bikes so close together will definitely keep you toasty warm. Worst case you can give your bike to someone who isn't a sissy and hop in the truck.