Candidly, I enjoy carrying large knives, but I also always carry a smaller knife as well to use when around others. Also, if you are going to use a larger knife, I'll say this: body language, a calm demeanor, and a relaxed face are everything when doing so. If you have to cut something, if someone sees you and you're entirely relaxed and casual as you cut the thing, then close and pocket the knife, that nonverbally tells onlookers that what they are seeing is "Person using a tool in a nonthreatening way". Virtually ten times out of ten, it works for me.