Every winter I want to keep fishing,so instead of winterizing my motor,I put a electric heater in the boat. Cover it with its main canvas then I cover the whole boat with a three mil tarp strapped around the boat. The digital thermometer I have on the inside says Temps are staying 80 degrees during the day,70 at night. I drained all the water out of the block and risers. This should be OK I'm thinking. Is there a better way to keep in boards safe from freezing and still keep fishing?