Check out "Freezer Bag Cooking" on the internet.
Besides the Mountain house, try foil packages of tuna, salmon, chicken or spam. Mix them with ramen noodles, Knorr rice or pasta mixes, or Idaho mashed potatoes, just put mixes in a freezer bag, add hot water and squeeze to mix. Then add meats and eat from bag, no clean up. Also use jerky or summer sausage, stick cheese with tortillas or flat bread for lunch. Breakfast is usually oatmeal or granola mixed with powder milk or protein powder. Snacks are PB crackers, granola bars, trail mix etc. Starbucks Via instant coffee in morning and Emergen-c drink mix in evening. Or Crown Royal nip to celebrate.