I’m not certain how the terrain generation is going for the Nothern Alliance territory, but I assume it won’t have as many trees as Darkmoor Forest. One way to compensate for this would be to have a new resource pop from digging: Peat! It’s a traditional fuel source that seems like it would be a perfect fit thematically. Perhaps it could be a new vein that only occurs in the dirt layer as opposed to the rock layers of the mountains. That way you could have lower numbers of trees to reflect an “above the treeline” existence and still make your iron weapons.
Perhaps there is a ‘tell’ in the terrain that will help folks know where the peat is, like… the cattail model! Looking at terrain generation as it stands now, I don’t think it’s possible to spawn a specific entity, since it’s randomly generated but it may be worth the time. @Fornjotr 's charcoal idea got me thinking and I didn’t want to crowd his idea thread with my own.