We purchased one of those COSTCO portable greenhouses sevral years ago, so we go from the house to the greenhouse to an open greenhouse then to the garden.
Maybe spuds will work in the raised garden beds this year.
Out on Fort Wainwright the community gardens use raised beds with black visqueen laid over the top. That is about the maximum that can be added to the growing season and the rabbits and moose both appreciate the work you do.