Wow, teams have bumpers that wrap all the way around? That's pretty cool.
The way we do it is just extend the pool noodle and then cut it off at a 45 degree angle. We wrap the fabric all the way around, and if we used the same color it may look like it wrapped around. (
http://www.chiefdelphi.com/media/photos/28201)
We just attach it per the manual, but on the bumpers we have flaps so we can get a nutdriver through the pool noodle, (these flaps are velcro'd on), and then you just get a hand on the backside and you hold a wing nut. We also have the aluminum angle on em.
If teams do have a continuous piece I'm interested how they did this too.