I do love Sourland and it's my go-to trail when I'm in NJ. I always ride from the lot straight up to and across the bridge. I take the outer trail up and hit Montezuma, Chunky Monkey or one of the other small trails so I can get to where Montezuma meets the end of the Boulderama trail. From there, it's a bomb down the C trail all the way back to the bridge and then to the parking lot. It's super rocky and unfriendly but it's like a puzzle that needs to be solved. I really enjoy that kind of riding. I find that it's not as crowded as the Boulderama side but you'll more than like encounter some foot traffic. Theres a reason the Strava segment is called "Dodging Hikerz".