John,
Agreed that bad practice is bad for your skiing or another endeavor.
I agree that if you were going to a multi day camp and bumps were on the agenda a ski more suited would be appropriate. Don't know what ski you were on, but just because it is a "GS" ski, doesn't make it inappropriate for bumps. Bumps are not my favorite terrain, I ski them equally badly on straight skis, SL's or any other thang you put on my feet!
MilesB may be able to offer suggestions on suitable skis for that terrain. He can work miracles, why with one short sentance on epic, he has muted my wife
For that I am in awe
To your comment about powder, I suggest that even if you had a true powder ski that one day in 30 inches you would still have struggled.