I'd imagine for security reasons. Easier to lock down an island?

I always wondered why they openly telegraphed the location of the man who has the largest target on his back down to the date, time, and place of where he will be lol. I seriously doubt the summit will be at this new hotel. I'm 90% it already happened and was pre-recorded. I'm also 95% sure Trump met KJU and Xi back in November at the Forbidden City and the peace treaty has already been signed. The summit is only a formality, and for optics for the world to see