Mylar bags for backpacking food keep food fresh and protected from moisture. How about vacuum sealing reusable (e.g., snack chip) bags?
Home-Dried: How to Prepare Your Own Lightweight Backpacking Meals
Some backpackers require specialized trail food. Others simply want to target a specific dietary preference. Learning how to make your own lightweight backpacking food is a valuable skill, and perhaps, easier than you think.