My wife and I did a two week tour of several cities in Minnesota, including Grand Marais, Duluth & Hibbing. We were up there to escape the Florida heat and didn't really know what we were going to do, but turned out to have a really great vacation. Please see my other posts regarding lodging, meals, etc. if you are interested in a similar trip.
Regarding Poplar Creek B&B...everything was fantastic. It's about 30 minutes due north of Grand Marais, but it was the highlight of our trip. They have cabins, but we stayed in one of the B&B rooms (Barbara's Suite). Nice family room, little kitchen, nice sized bathroom and a separate bedroom. We peeked in the other rooms before we left and they were very nice as well. Everything was extremely clean & comfortable. Barbara's breakfasts were great and definitely worth the extra money if they're not included with your particular room. Barbara and Ted were excellent hosts and provided so much information on their area and other parts of Minnesota that we were going to visit. We basically spent a day hiking, a day canoeing and a day in Grand Portage and downtown Grand Marais. We could've spent more time there, but we had to move on to our next stop. There are miles and miles of trails or gravel roads for hiking, mountain biking, snow shoeing, cross country skiing, etc., and they're accessible from the B&B or just a quick drive. It's in the woods but you feel like you're at home. We hope to be back soon.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.