Planning 2nd trip to Hokkaido. 8th trip to Japan. Autumn 2025

Hello, I just bought ticket to Tokyo end of Sep-2025. 7 Adults (35+) & 4 Kids (2yo, 5yo, 8yo, 11yo). Currently' I'm a bit confused on planning the itinerary as i don't want it to be too tiring, yet get the best of our time. I went to Hokkaido the first time in 2016. It was 5 days Hokkaido (Sapporo - Otaru - Noboribetsu - Lake Toya - Hakodate - 5 days Tokyo).

There are few things that I'm still confused at the moment.
1. Should I stay in Furano area for 2 nights or just take a day trip from Sapporo?
3. Should I drive to Furano or take a Day Tour?
3. For onsen/ryokan stay, any recommendation? should I go the one closer to Sappor or Furano
And for the itinerary, here's what I have so far. Please give me your thought and advice. Thank you

Sun, 21.09.25 Arrive Haneda 10pm. Stay in Haneda Hotel
Mon, 22.09.25 Fly to Sapporo (or Asahikawa Airport)
Tue, 23.09.25 Explore Sapporo
Wed, 24.09.25 Otaru Daytrip
Thu, 25.09.25 Move to Furano. See Flower Field & Blue Pond (Stay at Furano)
Fri, 26.09.25 Go to Asahiyama Zoo and explore Asahikawa (stay at Furano or move to Onsen town)
Sat, 27.09.25 Fly to Haneda from Asahikawa Airport (or return to Sapporo and fly from Chitose) - Shinjuku
Sun, 28.09.25 Tokyo (Asakusa, Akihabara, Harajuku/Omotesando)
Mon, 29.09.25 Tokyo Disney
Tue, 30.09.25 Fuji Q (ryokan at Kawaguchiko)
Wed, 01.10.25 Gotemba Outlet (back to Tokyo)
Thu, 02.10.25 Tokyo (Shimokitazawa, Shibuya)
Fri, 03.10.25 Nikko Day Trip
Sat, 04.10.25 Tokyo Free Day (Ikebukuro/TeamLab/Harry Potter)
Sun, 05.10.25 Tsukji - Ginza - 7pm Narita

wow, that is busy/complicated which is ok for solo or two-person travel, but I can't imagine the logistics of it for 11 people. A van for 11 passengers plus luggage?