Whichever knife you will miss the least.
This is what I was thinking too.
But I tend to want to take a few nicer knives along just to be able to use them.
The last canoe trip I took, I carried a Busse BAD in a kydex sheath on my belt. I used a Black Hawk retention lanyard to make sure I did not loose it.
I also took a Busse SarQ in my backpack.
This year? not sure, I can't, for the life of me, find the nice retention lanyard, so I will have to rethink my options.
I dumped my canoe in the lake a few weeks ago. I had my 6 year old son in the center, and another gentleman in the front. (Strong wind, cross waves, and an untimely switch of paddling side by both of us, not helped by the 6 year old's movement).
I did not think once about the knife in my pocket while trying to push the canoe and the the 6 year old to shore!
I was carrying one of my least expensive knives. A $300 knife on the belt, or in the pocket would have been one more thing to worry about. (my brand new smart phone was in a ziplock bag, and luckily stayed dry).
I am going on an over nighter here soon. I will have to decide.