I'm from South Jerz. Cumberland County. There's lots of long flat open roads with cows and farms and mexicans and not too many cars. I like riding from there to Cape May / Wildwood areas. But the State Police are quick to pull you over and take out their marital problems on you with their nightsticks.
If you're farther north, head towards PA. Like the Delaware river gap, Milford, or the Pocanos. I-84 going into NY is a blast and has great mountainscapes.