The reclaim rocks on this map blend in quite easily with the ground. The only way to tell is to use F4.

Vehicles would be strictly impossible rather than almost impossible.

quote: How would NW vs SE work here? Currently it seems like it usually ends in a standoff along the hill lines.

I came here to suggest this. NE/SW start boxes feel clumsy to play and leads one to porc the ridge lines. NW/SE would make the base easier to fortify and yields interesting choices about how to expand and establish a front line without the perpendicular ridges.