I've lived in Minnesota and Wisconsin for most of my life. Storage of starched fabric has never been a problem for me. Silverfish could be a problem if you store fabric in a damp basement and possibly if the storage area is not air-conditioned during humid summers. We never lived in a basement so damp it required a de-humidifer, and we have always used air conditioning in the summer, so that may be why I have never had a problem.
Having said all that, I don't prewash fabric so most of my stored fabric has never been starched. Not prewashing means that there is generally enough sizing in the fabric to allow me to cut accurately; at most I might add a little spray starch while ironing, before I start cutting. Most of my starching is done as I create sewn blocks, plus heavy starching of the backing fabric before I layer.