2 - 3 day hut to hut with seven year old

Hey all! I’m a single mom with a seven year old son. We’ve traveled together extensively and we hike regularly in our home region of Oregon USA. We want to find an easier circuit for 2-3 days of hut to hut hiking, an entry into this kind of mountain trekking suitable for a strong small kid. We regularly do 5-6 mile hikes and he could likely handle 10-12 miles in a day. Are any sections of trails between huts around this length?
Thanks for the help!