A few weeks in to my first long trip, a mentor said in a grocery store in Franklin, North Carolina: "You'll become one of two kinds of hiker: you'll count calories per pound, or you'll count calories per dollar. Either way, you win with cake frosting".
I struggle with his on through hikes bc as a diabetic I can’t eat a lot of the standard calorie dense foods. A lot of fats is really all that works for me :-(.