The folks I bp with will fill in best we can any holes, especially if in an area where skiers may travel through on their way down a hill. Snow sets up pretty hard overnight, so you can only do so much. You can't totally remove your traces, it's not like it will take decades for nature to recover from your stay. Next storm, all looks fine, summer comes, nothing. On my solo trips, I'll throw a few shovels of snow in the hole in front of my shelter where I had sat cooking.