It all depends upon how long you plan on keeping the trailer and the space you have. Most people in the south buy those metal pole RV covers which would probably be better for keeping the snow off of your trailer. They do get pricy but you have to determine just what your trailer is worth to you. I priced them here in Louisiana and it would cost me about $2600 vs a $350 strap on cover. I have the room, just not the cash at this time. It's not just the snow either; as sun and rain have a tendency to weather the exterior as well. I bought an ADCO from Camping World that was designed for wet climates but is breathable for rainy areas like Louisiana. The ADCO covers come with ladder and drip edge extension covers so it won't tear the cover; you just have to remember to put them on. The ADCO covers are great if you don't plan on using your trailer every other weekend because it takes a little time to put them on and requires a trip on the roof. If I ever save up enough, I'll be getting the metal cover.
2015 Cherokee Limited 274DBH
2000 F250 CC SD V10 4X4 8' bed, 4:30 gears, SCT X3
2007 Mustang Convertible V6 - Lots of GT mods
1965 Mustang Coupe I6, 3 spd. manual
1963 Thunderbird Landau 390