Actually, I was one of the guys targeehucker met on the trails last week, and I'm not ashamed to admit it!
It had been between 8 and 10 years since I had ridden the REP, was looking for another close place and tried this out on a whim.
I had only ridden REP a few times before: first time was back in 1998 when I was a student at Rutgers and, yes, I was accosted in the woods out by the old parking area. Guy chased me through the woods to say, "you know, that's a real nice bike". Flagged down a cop and got the whole low-down on the place. Made my remaining trips on early, brisk weekend mornings when I did not anticipate to encounter anyone on the trails.
It is a decent place to ride; the terrain along the creek is actually pretty good and some of the crossings are treacherous. The trails out by Rt 18 are fairly sloppy but offer a little more dense area to bike through.