Okay... as I have said in posts in the past I work at the park and have first hand takes of the radios and freqs.
159.465 PL 179.9 is NJDEP Parks channel 5 - This is mostly maintenance nowadays. However the PARK POLICE (No longer rangers) do talk on it to when talking to maintenance.
159.405 PL 179.9 is IBSP Lifegaurds.
Now....
151.190 PL 179.9 is NJDEP Channel 1 (Toms River Repeater). Here the Park Police call in all of their issues to Trenton. This means everything that goes on in the park that relates to Park Police is discussed and called in to Trenton. This is the channel you want to listen too!!!!
Once at the park... 159.300 PL 179.9 is known as SIMPLEX. The Park Police talk to one another at the park on this channel!
The units of IBSP are 684, 757, 758, 765, 781, 787