I have decided to take this in a different direction. Things are getting too unwieldy in Inkscape so I have switched over to Gimp.
Here is a (1/2 size) of where I am, with a different mountain and hill style (The water effect is just a placeholder and will be replaced with something more hand-drawn, eventually):
Where I am stuck now is the circled area. The description I am working with is:
I have come up with the following:Frontier Area:
"with its massive canyons and rocky formations, is rough terrain. Think Grand Canyon/Mesa/Badlands with scattered woods and Texas-like prairie/desert."
but am not 100% sold on it, so suggestions would be appreciated...