Depends on what you want to do. Harlan is a large area and you can cover a lot of ground easily in one day, or you can branch off and spend all day on one of the harder trails. There's something for everyone.How difficult are the trails?
And it's harder coming down from the top than it is going up.The sunset/night ride isn't a very difficult run to Bald Knob. Some of the trail towards the top is getting heavily overgrown so your ride will get some pinstriping and items like antennas and root top baskets tend to catch on stuff. The most worrysome part of the trip is the final climb to Bald Knob. I've seen some weird lines that can get a little unstable.
You guys will be fine it's not too hard.How difficult are the trails?