I recommend Tensing Pen also. Always a guard at the front gate, quiet and peaceful inside. If you want to step out, some good eats right outside the gate, Ras Roddys for ital., Ahbees for the best burgers on the island, or just down the road LTU for breakfast, or De Bar for awesome jerk chicken & lobster. Of coarse they also have their own restaurant, so you never have to leave if you so choose.
Sorry to hear about your husband, I did what you are thinking of doing, my first wife's ashes were spread at White Sands, she hated the cold, and Negril was our second home. Peace to you