My parents live near 66 and 10. I will be up with my truck over the holiday weekend. I cant say I know of any ORV trails up there, but I do a ton of 2-tracking and have a fun time with that. Also, I have a few cousins up there I can reach out for some trail info...... Gimme a few....
They have a great Fireworks show on the 3rd this year. We usually park early in the Fosters parking lot in Evart. Send me a PM and we can exchange #'s if you like.