Taiwan 台灣

Hi guys! I'm planning a 3-4 days weekend trip to Taiwan in early December. I haven't booked a flight yet, so I can land in any other airport that isn't Taipei, if the location is better. I'd like some more natural/countryside routes to do on a scooter if possible...not sure if away from the crowds is a possibility. My initial idea earlier this year was Taroko mountain/gorge...but yeah, I guess it won't be in very good condition just yet. I saw that many parts aren't planned to reopen anytime soon. What would be any good alternatives?

Thanks a lot!