Wookiee 3 = Cut thru trees?
I know folks have posted about this scenario before, but bear with a newbie. I'm stuck on Wookiee Scenario #3, where you have to defend your base long enough to sneak Han & Chewie out through some trees and escape by water. OK I get it, but how do you cut thru the trees? Every time I run the scenario I trigger the message "Escape through the trees," but when I bring Han & Chewie over by the trees, they just stand around at the treeline, unable to walk through no matter where I click them.
Am I missing some in-game trigger? Is a path supposed to magically open up, or are you supposed to go entirely around the map and get to the water from the opposite side?