Fred - may I call you Fred? You are closer to KVSP than you think. From North Brunswick, jump onto Easton Ave. and then onto 287. Get on 206 N toward Pluckemin/Bedminster and keep following 206 North. You will head into the town of Andover, if that helps to give you a sense of nav.
From 206 North take right hand turn onto Limecrest Road and follow to parking lot on right hand side. I drove there in about 40 minutes on a lazy and non-drive-the-speed-limit-saturday, from North Brunswick (used to live there).
The first time I rode this park was a great experience; I also had a very knowledgeable guide so that made things much better. If you are ever up for a ride on a weekend, let me know. Ron and I are always up to ride; he was my guide for that first ride and he would be happy to show any new people the trails at KVSP.
Take care,
JGR