The trails are well-marked with signage and a map at the start. Also a sign indicating the openness of the trail, you can also check on their Facebook page before you head out. As far as I've noticed though they are pretty much always open to people on foot. The trail is really easy to follow, other than the one connector trail really only one way to go. It is also marked all along with red blazes(red pieces of plastic nailed to trees.)
I spent my time running 3 loops of the 5.5 mile trail stopping at my car after each loop to refuel. The weirdo girl was gone by the time I got back from my first loop. I didn't see anyone out on the trail while I was there but did see one vehicle that looked like another trail runner's ride when I came back. The trail was decently smooth, really runable and had some decent hills that was a little unexpected. Towards the end of the loop there is a little lake or big pond, always nice to see a little water action on a trail.