I have a hill along the back of my property between my house and the road. It is naturally populated by mostly walnuts (about 30-40) and a few struggling pines the previous homeowners attempted to provide some privacy in the winter. I have removed most of them, the remaining three (Colorado Blue Spruce) are there as an experiment. I've cleared some invasives and added a whole bunch of juglone-tolerant native shrubs. In my never-ending quest for more conifers, I have found that hemlock (Tsuga) and arborvitae (Thuja) do quite well with walnuts.

My question is the placement of these plants on the hill which runs East/West. The road is on the South exposure and the backyard is on the north side of the hill. My inclination is to plant the arbs on the south side near the street which is presumably sunnier (and also tolerant to road salt somewhat). The hemlocks would be fine on the North slope which is in shade/dappled shade most of the day. Does this sound okay?

Most of my conifers are in the front of the house, well away from the walnuts (it's an acre lot). Zone 5 suburban Illinois.

Thanks