We plan on purchasing a 21-day JR Pass starting in Kanazawa on Sept 30, 2023. We will go directly to Hakodate and stay for 2 nights. From here, the plan is to go to Sapporo but stuck at where to travel around Hokkaido to see the beautiful Autumn views and utilizing the best Onsens. Any help here? I plan on renting a car once in Sapporo to see what can't be seen via train. Then, we fly back home from Narita on Oct 19, 2023.
Thank you help in advance.