For food preparation, I and the other camp cooks like an efficient thin blade (1/6" - 3/32").
The forged, thin and tapered fixed blade in the photo has seen its share of camp kitchen duties over the years. The knife is by Bethel Forge.
When the weight and bulk need to be kept at a minimum, such as wilderness canoe trips (our backpacking foods are already cut, dehydrated, packaged, etc.), I use one of my thin (1/16") Idaho Knife Works "Cliff Canoe" fixed blades. These knives slice and dice as good as any and, accomplish other camp chores with equal ease.
IKW's (Mike Mann) also makes the LFK (Light Field Knife) out of 3/32" steel. The knife handles and operates like a heavy-duty boning knife and has been immensely useful in the wilderness camp kitchens and hunting fields. This one has a 4-7/8" blade. A great companion with the Cliff Knife, or other.