I would recommend staying at the Thunderbird Lodge for accommodations (its the only place I have stayed at up there so far), I go there in early October each year for the past 6 or 7. For info, I would recommend the Rainy Lake One Stop gas and bait for info on fishing reports (you pass it on the way to the Thunderbird)
Our Canada trip got canceled as well, so we are going to Rainy in early August for a week since we know the lake some already. The Thunderbird was booked for early August as of a month ago (at least the cabins were all booked) so we are staying in a cabin at Sha Sha Resort. We are going back in early October as well.
If you have a Humminbird graph in your boat, I highly recommend getting the Lakemaster chip, there are lots of rocks that jump out in front of you on Rainy.