This may seem like a novice question, but I'm considering building a kit boat next summer.  The problem, I live in Duluth, MN, one of the coldest in the country in January.  I know the late Harold Payson said he left his instant boats sheathed in fiberglass out all year in Maine and they were fine.  My question, "does a wooden boat finished with fiberglass cloth and epoxy need to be stored indoors in a heated environment, or can they survive on a trailer with a really good cover?

 Unfortunately I only have my garage for the build, but in the winter, I need that for the car.  Renting a storage space could be an option, but not if the boat would be fine.

 Any advise.

 ps: my dream is to build the pocketship kit. We'll see...

Thanks