"Keep a third of the fleet as a fishing fleet near White Harbour. Send the rest to Braavos and Pentos to trade for grain and foodstuff that can last for at least three years. House Stark can send down lumber, iron, and furs through the White Knife. Lord Cerwyn would most probably be agreeable to this venture too. If you have trouble finding more resources, ask the Houses that have access to the eastern shore or its waterways."