Not really sure Mike,  I would say it depends on if they stop at the Klondike check point or not.  And if they do,  how long they stop.  
I do know that right now he should be at about Washington Missouri right about now.  
They dint have a GPS tracker on their boat but a guy that is about 10 minutes ahead and of him does.  That's how I am figuring out his current location.  The website only showes check point check it's and out 's.  
Ill see if I can figure it out thought.  
Patrick