About 10 years ago a friend and I did the loop you are talking about and went through Rapid River. It is touch and go trying to find your way through there. There was some road running where you questioned where you were going with minimal snow on the sides and very few blazers - like next to none. We spend most of our time following other other tracks. However, looking back on it, it had to be one of the best trips we took - 900 miles in 4 days of riding going to places we had never been before. My recommendation would be to do it but make sure there is enough snow and you have a full tank