Be wary of putting PWPs near the plaza more so if it's permanent. I'm not sure if those PWPs would fit there but that part under the town tree is a good spot. Also, I like the spot on the left of the town hall or beside the left-most character house. Those are pretty big spots (barring the rock placements) though my ideal place would be on the lower half of your map near the Re-tail, most specifically above that pond over there, that is, if it'd be okay for you not to have the cedar trees but put the bamboo or normal saplings instead. Good luck