You'll love the Azores
. They are beautiful.
UHT milk is increasingly available in the US. If it isn't with the rest of the dairy products check the area for baby food
. Parmalat is a common brand on the US East Coast
in liter boxes. You can also find one cup "sippy boxes" that are very handy. "Mini-Moo" coffee creamer is also UHT.
Spam is not real food
. Your opinion may differ. Try some before you stock up. I have had similarly bad experience with canned ham. Canned chicken, tuna, corned beef, and salmon have worked out well.
I load up on fresh fruit and veg and eat as much as possible early days before it goes bad. I keep it out where it is ventilated and I can see signs of early turning in time to use it up.
Cabbage, carrots, oranges, apples, onions, and potatoes last long enough to carry you nearly all the way there.
Morningstar soy-based sausage is quite good and lasts a long time even without refrigeration
Making your own bread is easy but does take some practice. Don't put off making it the first time until you are at sea. Practice on the docks.
Arnold makes a product called Sandwich Thins that last a long time. Recommended.
Eggs last a long time. I store mine in a locker near midships and flip the whole carton every three or four days to keep the albumin coating the inside of the shells. I've gotten months from eggs. We bought 14 dozen at Tesco in Hamble and I was still eating them in Annapolis
three months later.
There are a lot of options for canned food in the US with near indefinite shelf life. Some are better than others.
A Foodsaver (brand) vacuum sealer is worth its weight in gold. It nearly doubles the life of most products.
Choices vary depending on your fridge and freezer