Okay, so here is the preliminary map.
It is NOT annotated, after filling in the details I decided that trying to squeeze in notes (even in a different colour) was asking for COSMIC cluttering. Hence, the new "package" will be:
A short letter from the previous owner (a merchant)
A set of notes about what to trade where and with who (and who not to)
Possibly a diagram of some recommended transport (might save that for another time).