I planned to do a 3 days trip in Nagoya and use it as a hub to Takayama and Shirakawago. What other places can I do other than these two towns? Do I need to stay in Nagoya to visit these places? Or you would propose a night in Takayama? I have 28th April (arriving at 2pm) to 30th April. I leave on May 1st morning. Any tips help. Thank you!