My main concern with carrying a fixed blade is the legally contentious issue of concealing it. Years ago, I tried open carry of a fixed blade for a while but gave it up because the attention it received was undesirable to me. Concealing folders is reasonably well-protected by the laws of my state and the ones around me where I travel. As far as I understand it, concealing any fixed blade is untenable in California and while it is not necessarily illegal in Oregon, Nevada, and Arizona, the laws of these states restrict concealed carry. In Oregon and Nevada, it is illegal to conceal a dirk, dagger, or "stabbing knife" (OR), "machete" (NV). It is actually the interpretation of what a dirk or dagger is that leads to the conclusion that all fixed blade knives and folders that are opened are illegal to conceal in California. While Oregon and Nevada don't have the same interpretation as California, Nevada makes it illegal to conceal any knife which could be considered a, "dangerous or deadly weapon." In Arizona, the law requires a person carrying a knife concealed to notify law enforcement officers of this fact upon contact, unless it is a pocket-knife (which is probably interpreted as folder). Notably, the concealed carry firearms permit in some of these states does not license or permit the holder to conceal knives or edged weapons. It seems to me that carrying anything but a folding pocket knife is a legal minefield.
When I experimented with carrying a fixed blade, I tried sewing a sheath into the cargo pocket of cargo pants. I believe it would have failed California's standard for open carry because only the handle was visible outside my clothing. If I had hung the sheath from my belt, my coat would have covered it if not an untucked shirt. The problem with the cargo pocket was that the pant leg could be pulled up quite a ways before the knife was withdrawn. I like neck-sheaths, and tried that but found it if I could not put the knife inside my shirt, it would swing around unless I clipped it to the front of the shirt and then it would pull on the shirt. The most practical solution I found was to lash the sheath to a backpack or put it inside the backpack. Curiously, concealing any legal knife in a backpack is not a crime, but if I conceal an ice-pick next to my .357 Magnum, I could be in big trouble, for the ice-pick.