Very nice itinerary!
But I plan to stay in Yilan these several days not sure if you can recommend the good 民宿 to me and maybe the hot spring as well!
I just saw the pictures from another article of 砲台山 and 朝陽步道, it's really nice.
Wish you have a good trip, and if I finish my trip there I will post some good pictures to share with you guys as well!