Wings at War Winter War Woods

I've had this project on back burner for a couple of years but feel like it might be time to warm it back up again, and why not? One thing I need to do is work out the initial layout for the game, akin to the system in MiG Alley, where one side or other gets to deploy ground targets and terrain in the shape of hills, over which aircraft at Level 1 cannot fly. This seemed a bit superfluous for Finland which is largely flat as a pancake but is a really good feature of the game, as it makes it harder for some aircraft when on low level ground attack missions. Instead of hills I am thinking of making the terrain templates areas of forest, with the same limitations for low flying planes. As a lot of combat in the Winter War and Continuation War was at very low or even tree top level, I think this would be a neat way to make the games more exciting and add some scenic variation to the table top?