You can go up the South Fork trail from Harris Park, take up-and-back trail to Target Meadows, up-and-back on Rough Fork trail to Mottet Springs then up to top of South Fork trail at Deduct Springs. From there get on the main gravel road go North (East?) to the N. Fork Trail. Go down the N. Fork Trail and end up at Harris Park.
It's only about 40-50 miles but could take all day especially if there are some downed trees to cross.
I have to work or I'd go too!