I carry 4 knifes. One is a small Swiss Army type that stays in First Aid kit. Has the scissors/tweezers/magnifying glass etc.

2nd is my little personal knife, about 6" over all. It's in a Kydex sheath, that clips inside the right side cargo pocket of my paddling pants. Out of the way wearing a pack, but easy to grab when needed. I like a straight blade over a folder, unless you can open the folder with one hand. The Kydex sheath is nice, Locks the knife securely so you don't end up looking for your blade. I use this for opening food packages, cutting line, 90% of everyday chores.

The 3rd blade is a Gerber blade that is now discontinued ( figures) :(
It's similar to the River Shorty they still sell. but has a partially serrated triangle shape blade that's pointed instead of blunt. Comes with a one hand Kydex sheath, with a safety button you depress to remove it. Has bright yellow Neoprene handle for sure grip when wet and high visibility. This is attached to my survival gear fanny pack that stay close at all times on water.

4th is a 6' Gerber fillet knife.  I also have my camp saw and small camp axe.
Sure I could get by with far less, but they don't really weigh that much, probably about the same as a larger axe or machete would. I'm a knife fan.  I just like the feel of a good blade in my hands, Sort of brings out the "wild" in me ;D

One thing I wouldn't do, is bring ANY knife that I couldn't afford or bear too lose ;) I have a few knifes my late Father left me, that HE made from old lumber saw mill blades. I take them car/wilderness camping, but would never risk them on a canoe trip.
 Same philosophy as many of us have in regard to fishing rods/reels.