Sounds like a fun campaign!
I for one really like these maps. They are informative and very nicely done. I think you might want to consider making your muddy river texture a bit smaller.But other than that , Very Nice
I am the breath of Dragons...The Song of Mountains...The Stories of Rivers....The Heart of Cities.... I am A Cartographer....
Kingdom Of Shendenflar Campaign Setting (WIP)
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I really like this too. The style is original, albeit it can look a little syntetic someplaces, but it's very nice work altogheter.
If I where you I would probably try to find a more realistic grass texture, especially on the two first pieces. That is if there is not a thought behind that symetric look.