Sounds like they are open to suggestion on the windbreak, and have some flexibility,
Right now I am thinking best case scenario, I would go
4x4' spacing with the roadside row of Red Cedar
followed by 3 rows of 7x7' spacing of Norway spruce
followed by a row of ....something Pine???
How does this sound as a starting point?
Does the plastic help, or hurt evergreens? The water table is very high in this area. I would love the weed protection, but would fear hurting the evergreens, I know they prefer well drained soil. Thoughts on that