Water weight has zero calories, so anything with water in it has excess weight.
Generally speaking fat has 9 calories per gram of weight, carbs and protein only 4 calories per gram. (One significant digit, so there is room for error here.) So, try to get enough fat. Olive oil can be added to a lot of things without detriment. But, you need some balance, you can't eat sticks of butter while you swill from a jug of olive oil and expect to live very long. So aim for a mix of protein, carbs and fats. Peanut butter on tortillas gives a good mix of fat and carbs and protein, if you want to carry a bit more water and flavor you could add jam or jelly or honey to it.
Keep in mind that carbs are fast energy, the body can't use fat and protein very fast, so during the day while exerting yourself, that is when you need more carbs, less fats and protein.
Although Ramen has mostly carbs, it is extraordinarily light weight and easy to make but might be more bulk than you want. It can be added to other one pot meals to increase carb calories.
Pasta is mostly carbs and dried pasta is very dense. McCormick makes a spaghetti sauce powder mix that you add tomato paste and water. Add some diced beef jerky for more protein and maybe a shot of olive oil, you have an outstanding meal that was pretty light weight. Tomato paste in a tube costs a lot more than in a can, but is much more convenient, especially if you do not want to carry a can opener.
