Looking forward to try that terrain.
As a enemy aircraft, what If we use a civilian drone went rogue? We can shoot it down with water. About Enemy area, maybe is a freaking idea, but why not to create a area of damncommie evil CROPS. Yes, CROPS. Some tiny enemy targets (maybe a really small 3d box) hidden in the TOD crops, maize or wheat. A target that can be killed (without resulting smoke) by a cluster bomb like a crop dusting plane, this way we will have the enemy area AND we will be able to add another Civilian aircraft mission. Crop Dusting.
In Stary Germany the crops are there, but we will need to add some kind of 3d plant to hide the enemy target and make the crop dusting more realistic.