My Hexon terrain uses 'in hex' river features, but I am having problems getting my rules to reflect how smoothbore armed units that can only fire 1 hex, can engage with units on the other side of the waterway, which is essentially 2 hexes away, even though the waterway (Bull Run) is know to be narrow enough for smoothbore fire to reach the other side.
I have done a blog post, more really to highlight the problem of trying to shoe-horn new rules into existing systems.
LINK
http://battlefieldswarriors.blogspot.co ... ivers.html