Knives are a bit of a taboo subject these days and I do wonder if others, like me, have an uneasiness whenever I carry one in my rucksack. However, I still believe there is a place in my rucksack for a camping knife and still pack one for any trip including an overnight stop. I use my knife for a variety of reasons and all legitimate ones on a camping trip. My knife is made by opinel and is small but perfectly formed.
Opinel do a range of knives in various sizes. All have the same basic design. When closed, the knive folds into the wooden handle and is closed in place with a little metal locking collar. When open, the metal collar locks the blade in place. Very very simple, very cheap and very light. I like the simplicity of the knife most of all and it is sharp and well suited to a variety of cutting duties. Mine is one of the smallest in the range and weighs a paltry 30grams and cost me under a fiver. If you are really worried about carrying even the smallest of camping knives, opinel even do a round tipped safety knive.
none so far and only time will tell about its longevity