Based on the timing of the storm and he fact that you will be at the canyons, dont worry about setting your bindings back. Most of it is coming tonight so tommorrow would be the day to really get after it. You will still have good snow on the weekend but the wide open deep lines where you would want a setback will be tracked out. just ride with the stance your confortable with and have fun.
And also bring a tool in case Im completely wrong.....