Re: provisioning for a 400 mile passage..
Take dried fruits and nuts. Fruit can be used to spice up sauces or add to rice. Dry pasta, jarred pesto. Pecorino remano to cgrate. Bisquick...can make pan breads or even batter fish and panckesa with it. Better than flour as it has a levening agent.
Dried meats can be reconsituted into shipped beef, even stew. Carrots Onuions and Potatoes are great for a long passage. Dried beans a good source of protein.
You want some easy to prepare stuff in case the weather is to rough to use the stove too.