Yeah, Paragon has gone the way of the Do-Do
Rausch Creek is nice, but only worth it if you are going to make it a few times per season and have some friends to go with you (which aren't hard to find if you search this forum)
The Jersey Pine Barrens (Wharton State Forest) is a good place to go for free. Just stick to the trails as the environment is quite delicate there. In other words, tread lightly.
There aren't a lot of obstacles, just a lot of sand. There are, however, mud holes that could easily swallow a jeep whole. I've seen it