Thanks for all the thoughtful responses. The last minute supply option is something I didn't consider. Methinks we will opt for the rental car.

Putting together the itinerary for a 2022 hike, taking the ferry from GP to Windigo, hiking to RH and taking the ferry back from RH. My group would be flying in from Denver presumably to Duluth. How do folks get from Duluth to GP without renting a car and letting it sit for a week??