The AHRMA website says there is no camping at the Portland, MI nationals. There is. See the letter I recieved from Rob below:
Teddy,
Camping is available at the Portland Trail Riders. We simply can not advertise it as we are not a "registered" campground with the State of Michigan.
Please pass the word "you can camp at Portland".
Rob Heindel
Portland Trail Riders
I'll be pulling in around midnight Fri. I'll look for your trailer Teddy. See ya.