I'm a long time backbacker, winter hiker and ski tourer (over night trips on skis) and bike tourer. IMO, "camping" and "survival" are issues that are very, very closely tied to a) location and b) style of travel.
Taking a cue from the ultralight backpacking crowd, I've found that the only knife I "need" for modern backpacking is a tiny key chain type of swiss army knife and most of that is for the small scissors which are handy for routine 1st aid needs (moleskin for blisters, bandage shaping) and equipment repairs (sewing). Some modes of travel require tools for repair and these tools can sometimes be approximated by blades on multi-tools or SAK type knives. But in general, I find carrying specific tools for repairing specific equipment is a better bet. My crampons need a specific metric allen key size to adjust. Ski bindings typically use posi-drive screws and using a phillips head in an posidrive screw is a recipe for a stripped screw head.
I live in New England and this statement is definitely tied to my location. I'm most concern about no-kidding survival issues in the woods in the Fall through Spring seasons, as hypothermia is a real threat if you can't get out of the woods quickly. For emergency shelter and fire, I would rather (and do) carry a small folding saw. This isn't a ding against the bushcraft crowd in any way. But in my woods, I can more with a folding saw faster and with less energy output than I could with a knife.
I do choose to carry a knife in the backcountry with me. Its location of carry explains my thinking. It can either be found in my pocket or the food bag in my pack. That is, I choose a knife that will double for EDC general cutting needs and a more rewarding and fun eating experience. I can and have spread peanut butter with my spoon or cone wrench (bike repair tool), but an EDC knife with a widish blade is just a bit nicer.
My current go-to knife for backcountry travel is my Opinel #8. It's insanely light for its size and cutting ability and it's shaped nicely for general kitchen use (peanut butter spreading, cutting hard salami or cheese). I may replace it with the new Buck Ecolite 112 but the primary reason for this is emotional, not functional. I just prefer the feel of the 112.
Summarizing: My suggestion is to pick a knife that is EDC light but large enough to work well for meal prep. For survival, my suggestion is to read as many books on backcountry travel as possible. I think the books by NOLS are excellent, as is "Freedom of the Hills" (Harvey Manning - Seattle Mountaineers), "The Complete Walker" by Colin Fletcher.