Yeah, I know guys who've gotten tickets there, and I know people who've been followed home by civilians who didn't like the fact that they were riding in Eagle Rock.
Ringwood is fairly rocky for sure.
The stuff in Cedar Grove keeps evolving which is kind of cool, and it's growing in popularity (may be good or bad)... Not sure how far you've ventured from the park, but starting from the Community Park / pool, if you make a right on the rail trail and go over Rte. 23, there's some fairly mellow stuff on your left (my 7YO's love it in there) between 23 and the next street crossing. After the street crossing, there's more great stuff that's a little more challenging.
If you want to do a small road trip w/ the team, check out High Bridge NJ (about an hour from here), but there's a rail trail, a solid trail system (Nassau Trails), a pump track, and the new one-way flow trails—something for everyone for sure!
Also, be sure to take the team down to Allaire State Park (the south side trails, not the north side trails)... A lot of good stuff in there and little spurs off of the main Orange, Blue and White trails.