The idea is to have a somewhat mazey/canyony feel to the map. There is also a moderate sandstorm blowing sand around.
I'm not that mean though, I usually put small treasure boxes at dead ends.
I hate nothing more to find that I walked to a dead end to find nothing.
Also, a reward helps to give it a more "exploratory" feel, if the player anticipates this and actively seeks out rewards.
Or at least, for me.
Anyhow...
Northern
Central
Southern
Let me know if you have further questions and I'll see what I can do.