I did some research, and discovered that people have had nightmares with syncing notes from the Notes app via iCloud, in that all of the notes get permanently deleted. Before seeing these articles/forum posts, I had considered activating cloud sync for my notes, but given the danger, I don't think I'd like to do that.
Thus, I'm looking for an alternative solution. I have heard of OneNote, Box, and so on, but what I have not found is a way to sync one's notes from the Notes app on both Mac and iOS across some other cloud. If anyone has any ideas I would really appreciate it.