The trains that serve the Southern Sec usually come from Browns yard, and enter the Coast Line at Church interlocking in South Amboy, so the bridge shots you could get with it are Morgan and the Navesink River Bridge (thats a good shot, from the marina on West Front St.)
A drill crew from Linden yard comes down i think only once a week, ive only ever heard them on Thursday mornings (I think its thursdays - my days tend to blur into one another ) to serve Cutters between Wood interlocking and Woodbridge station.
But there is a lot of interchange traffic between the Amboy Sec and the Chemical Coast, so there are freights that will go between Wood and Essay interlockings, and those will have bridge shots at River. Don't forget about the steel plant that gets served daily at Perth Amboy.
Unfortunately, Builder's General in Little Silver doesn't get directly served by rail anymore, but it was cool to sit at Little Silver station westbound and watch them drill the siding right in front of you, as the switch is right on the other side of Sycamore Ave, and the station. So now, there is no more frieght west of Red Bank.