I've done this one dozens of times, almost always with a side trip to the Erskine Lookout.
I usually took Bear Swamp road to the Cannonball trail but that looks like it's off limits to the public now. It can be done by a hike from the Ramapo Reservation (Be warned, the parking lot often fills up).
One interesting time was in 2012. There was a very strange, very bright stationary light source or reflection far off in the distance. It was a bright sunny day, so to see it that far it must have been really bright. If it's a reflection I hope it doesn't cause a forest fire.