I snowboard in the Northeast. Massachusetts, New Jersey, Vermont (this Feb), etc. so I don't get that powdered snow. I get ice. And this was with rental boards too. But I'm doing squats and running to strengthen my legs so I don't fatigue along the day. We'll see.
??? are you saying your board gets scarred because you get tired and run into things? If so, squats and running are for the off season. Go ride