Mary Holland of the Architectural Digest, wrote a very nice article of the Setouchi region this year in April. The article can be read in full here:
https://www.thejc.com/lifestyle/travel/holidays/exploring-the-art-islands-setouchi-japan-1.486101
Writing with a sense of urgency to not miss the islands of Naoshima, Teshima, Shodoshima, and even Momoshima, she puts visitors minds at ease, letting them know that ample resources are out there to help people navigate the area. Japan is still one of the safest places in the world to explore and enjoy. There is no need to be apprehensive.
Just book that ticket. Set up your accommodations. And prepare your mind for a most unusual, and deeply satisfying cultural experience.