View New Jersey Campgrounds in a larger map
Really cool is the NEW campground on Sandy Hook! Opened by the National Park Service two years ago, this is the only place you can camp on the Jersey Shore AND it's right off the really nice Sandy Hook Bike Path.
Also note, unlike most State and National Parks in the American West, New Jersey Park Campgrounds do not have special "Hiker / Biker" sites for the "passing through" bike tourist (Hint, hint, NJ Parks and Forests!) and rangers will turn you away at nightfall even after a long day on the bike (yes, this actually happened to me). Advanced reservations for State Park sites require a two day minimum stay which is not useful for the passing cycle tourist and VERY expensive at $50 for two nights ($60 for non-residents)! NJ State Parks used to hold open a number of campsites for day-of arrivals. One used to be able to call that morning and make a reservation for a campsite the same night. We are not sure if that is still the case so do your own research and call ahead.
Overall, weekends will likely be booked out, weekdays less likely. Some campgrounds might be worth two nights stay like those near rivers, lakes and beaches where one can take a break from the road.
While I've made some updates, please note that this map dates back a few years. Last we checked, the very popular campground at Bulls Island on the Delaware River, north of Labertville has been permanently close (updated on map). Some other campgrounds may have also closed since this map was put together. Call ahead!