I once owned a property on the land side of the bay, in NJ. I planted blue rug juniper in the sandy, acid soil and never watered. It thrived. Along the sandy, unpaved roads in the pine barrens, Arctostaphylos ova-ursi(bearberry) thrives and really can be damaged by fertilizing. Both would only do well with at least a half day of sun and shade from tree branches that are very high. Neither is very tolerant of being stepped on, so pavers or stepping stones would be needed with any traffic.