I recommend that riders head South from the jct of Highway 281 and 57 to Sheyenne, ND. Then you can turn East on Eddy county road #1. It is easy to find. Just watch for a big green sign that says "WARSING DAM" along highway 281 as you head South through Sheyenne. Stay on that road about 20 miles and you will hook back up with highway 20 about a mile South of Warwick, ND. Warsing Dam is has a decent park you can camp in also. Primitive camping with outhouses. Food is available at the bar or Cenex gas station in Sheyenne.
This alternate route will also shorten your trip a little.