separated my shoulder at Windham last season in the lower terrain park. just fell off a rail and bang, popped my collar bone. i walked down the mountain and found a ski patrol dude. they offered to lay me out and roll me into the first aid unit (just like you described), but once i saw those rollers, i was like "nah, i'll walk."
don't know about you, but i got some pretty good treatment at windham. i'll always have the dreaded "hump" on my shoulder, but it's recovered pretty nicely since then.
know what you mean about that ride home, though. that sucked. big time.
62" 2008 Burton Royale
Burton Cartel bindings
Salomon Synapse boots