INEXPENSIVE TARP
In my opinion, you are still better off utilizing an inexpensive plastic tarp that you can then use to rake leaves after one or two winter seasons. If you remove the lifeline stanchions, and the mast is properly braced on the deck and extends over the bow and stern pulpits, you should not require any type of sophisticated framework. Yes, last winter was difficult, but I experienced no problems using a $36.00 blue tarp (West Marine on sale) to cover my 1985 O'Day 26, and I will get a second year out of the cover. Yes, the boat is in my yard where I was able to monitor smow and ice accumulation, but I have owned two other O'Days that I stored at a marina during the off season and also covered with an inexpensive blue tarp - not the more expensive Taylor made tarps (not necessary). As Ed suggested in his response, it is unlikely that an accumulation of snow would have any deteriorating effect on your boat; certainly nothing like the damage caused by the sun during the sailing season! However, a cover does keep leaves, etc. and ultralight rays (very few last winter)off the boat and makes for an easier spring commissioning. I would never consider shrink wrap due to what you can accomplish for significantly less cash each year. Boating is expensive enough without throwing money away! Good luck