One must guard against being seduced by the ghosts of Action Park, the gone-but-definitely-not-forgotten adventure oasis in Vernon, N.J., that offered thrills, chills and broken bones in equal measure. Those ghosts, many of them in casts or bandages, will gather you in and tell tales (mostly true) about the bloody noses and the chipped teeth you got on the enclosed water slide called the Cannonball Loop. They'll try to explain the rush of adrenaline you felt when you flew off the Alpine Slide. They'll chuckle as they relate how many moons were flashed on the Tarzan Swing, how many bathing...