Decided to play with the Module Editor & it is powerful.
Especially after the 1.3 update.
Using a copy of the original module I decided to make some adjustments.
First, I made all the forest tiles accessible still giving the AC bonus & limiting movement.
Then I removed those worthless (?) deer & replaced them with attacking wolves.
Increased the groups of snakes to 3, some additional creature adjustments, & put down some treasures to make traversing the entire map meaningful.
Thought I would share this with any would be creators to get them motivated.
I will add, it appears zones can be huge...though not sure what the limit is; so even a 1 zone module could be quite the challenge.