to cover or not to cover that is the question ?

If you don't have too much snow, I posted it few times with pictures of my carport.
You can buy couple of those "tent garages" and put them together.
Fence piping will make foot extension to raise it to RV roof level, while replacing the tarp with metal roofing will hold some snow.
You can build one for about $300 material cost, plus metal roofing if you go for this option.