Storing a Sunfish outside for the winter

I've seen different opinions on how to store a Sunfish outdoors. I live in Northern NY so we get a lot of snow in the winter. I've been keeping it uncovered, on it's edge, leaning against a wooden rail or the side of my house so the weight of the snow isn't piling on it, and a piece of wood under the edge so that it is not in direct contact with a frozen ground. Is this correct? I've read you should cover it with a tarp but I've also read that this is a bad idea because condensation can form...

Storing a Sunfish outside for the winter