If anyone's interested, I redid the map of Lastwall to add in a lot of the small things that weren't in the AP map. You can find the link here .
A couple notes:
-The border forts on the western edge of Lastwall are alluded to, but never explicitly mentioned.
- The ferry to the NE just seems logical.
- the roads are also logical inferences and are the main roads within the kingdom.
- the purple dashed lines are former Hordelines. Lastwall lost a lot of land.