We don't get much snow in my region so my solution may not be for you but, I simply pass my handling lines from fore to aft, across my windscreen grab rail, criss-cross make one turn on the grab-rail and tie off on the aft cleats. I then cover the boat with a 20' X 30' tarp and anchor to the trailer with bungee cords. I keep the motor tilted up and the will cover part of the cowling but I use a smaller tarp for the engine as a back-up. I use my boat weekly from April to February but cover it between trips. I like the idea of the tarp for air-flow to keep her dry. Like I said, this may not work for heavy snow accumulations but you never know.