Clayton is pretty small and easy to navigate, but if you'd like to have the trails mapped for quite a few of the NJ trail systems (including Clayton), load the Open Street Map onto your 705 and use that. I've been tracing the trails onto that map for the last year or so and it's nice to have, at least for the first few times you visit a new location. I haven't been to the far northern and southern trails yet, though.
You can also download specific trail rides from Garmin Connect...