mrsjoannh13
Fishaholic
Maybe get some of those Hot Hands things? I know hunters will put them in their boots and gloves to stay warm. You could put a few of them around the tank and then wrap with blankets or foil or something to keep the heat in.
Will you have access to hot water? If so maybe you could periodically check the tank temps and take a cup of hot water and pour a bit in as needed to maintain a suitable temperature.
Will you have access to hot water? If so maybe you could periodically check the tank temps and take a cup of hot water and pour a bit in as needed to maintain a suitable temperature.