You could try Grand Portage Casino. It's six miles from the border crossing into Canada. Right on Lake Superior. Or you can see if there's any vacancies at Grand Marais RV Park and Campground which is also on Superior, but about 41 miles from the Canadian border.
I have stayed at Grand Marais RV Park before. If I remember correctly (2007) it was a decent place. I think it was right on the lake with waves blowing in to shore. Our dog had his first experience with being in the water like this and was funny!
Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500