milkman used to be my go-to until I went Vegan (part of my transformation after a little bout with an artery in the heart last year.....). One gem I came across was cashew milk, which is simply cashews and water thrown into a blender with a touch of vanilla and sweetened with a few dates. Unsweetened is delicious. For the trail, just grind cashews in a coffee grinder to powder. You might be surprised. If you want sweetened, use anything you normally sweeten with, or dehydrate the dates (they are nutritious way to sweeten).

On that note I would add that when I purchased a dehydrator 2 years ago, I found the world was my oyster (lots of disastrous experiments, but a lot that came out great with drying fruits, peppers, herbs). Makes great jerky too. On trail, I am not totally vegan, I eat jerky (hope my doc is not on this forum - sodium content is out of sight for me I know, but...). Powdered cashew also makes a great add to a soup or stew.