A few I know went to Alta/Bird..tried to ski deep powder as their first days on snow and got hurt..which ended their trip as soon as it started.
Thoughts...
I try to avoid going into the trees for just that reason when deep powder hits. I have all mountain skis that are not great in deep powder which makes it all the easier to get hurt. I know that way of skiing is definitely against the grain but when a big storm hits I'd rather stay on the wide open runs and not injure myself.
Tony