[trout taco]

I don't know the Ramapo but the flatbrook will have fish in it. The usgs site has stream flows and water temps. unfortunately they all don't eat at the same time but fish have eat. Look for warmer water trends or what time of the day the water is warmest. Use light line and keep your offering near the bottom. Big mistake is anchoring your bait to bottom. Trout will rise up a few inches in a drift to eat. A nice drag free drift near the bottom is perfect and if you get hung up every now and again your doing it right.

In my experience floating a butter worm or salmon egg is king on tough cold water trout. A small plug (yo zuri pins minnow) or a spinner will always produce also.
Trout magnets and Trout worms work well when they are really chewing latley the trout magnets have been better than the worm. Ive had one fish days and other days I have hooked dozens. That's just how the winter can go.
Good luck. I should of mentioned not all the rivers have a temp gauge here in NJ.