i use just normal snowpants........if snow goes down my butt oh well its just water

i rock the foursquare chino "easy mooning access" pants. they have extra huge straps
on the waist that you can pop quick if you have to drop your pants and show someone
the sunny side on the slopes.

i ususally wear straps so snow doesnt freeze my legs to death. but i put the straps under my sweatshirt.... 

That's what I do too