"Consider putting a couple of
"Consider putting a couple of dehumidifing canisters inside the boat with new chemical; calcium chloride I believe it is. Available at any boat shop.
These will absorb excess moisture that may build up inside the tarp and could eliminate mildew and mold growth, as well as corroded wires and terminals.
Cheap insurance.
If you have power handy another good idea is a small electric heater, or even a 100 watt light bulb hooked to a temperature sensitive inline switch. The heater or light can be set to turn on when the temp drops below freezing.
Rod"