Well, looking at and scanning the maps I made this last week, I felt a huge "meh" and have had my hand at more free-form mapping using Photoshop. I like the results so far. Here is one copy of a map without any accessories such as stairs, doors, numbering, etc. at about 50% scale:
I suspect the final product will have minimal keyed and set locations and some involved random encounter charts keyed by map themes.