HEY!
I'm a member of the Twin Cities Trail Riders (TCTR) and many of us have ridden the single track that used to be open [with purchase of a Jackson County permit]. We quit going when they closed the single track and only left the ATV trails (sand freeways) open. But if you've got access to some single track... I'm certain there would be a bunch of us willing to drive back out that way. Just make a posting on our website's forum and you'll have riding buddies!
By the way, TCTR (Twin Cities Trail Riders) are holding an organized, AMA-sanctioned trail ride in the Paul Bunyan State forest June 28th-29th. Free primitive camping beginning Friday night and trail riding on a marked course Saturday and Sunday. Trails for all skill levels and ages. Great family fun. See the TCTR website for more information www.tctrailriders.org