Use a Mule all the time.
Never thought about blowing it back in, I'll have to try that next time.
I'm a thirsty bugger, nice to keep sipping away whilst on the lifts on the way back up.
Plus it always gives you a little more back protection. I don't wear the full back protector as I wonder where you'd stop with protection equipment, but quite a few years ago, I had a silly off on a t-bar with my Dad. Somehow, to this day I can't work it out, one of his ski's caught me in the back. Bashed me up pretty bad. I know with a back pack I wouldn't have had a problem.
Just keep water, my shades, spare fleece, bobble hat for when I stop for lunch and a bit of sun cream....although I will say you find yourself a little forward on the ski lifts.