And, back to the original subject of this thread. Here's a link to the latest official guidelines for visiting the Cape and Islands.
Here are a couple of excerpts.
Cape Cod, Martha’s Vineyard, Nantucket, and the Elizabeth Islands are small year-round communities whose residents appreciate, welcome, and depend upon you, our seasonal residents, non-resident homeowners, seasonal workforce, and visitors.
During the COVID-19 pandemic and the upcoming summer season, we all understand the desire to return to visit, work, or live on the Cape & Islands. So far, we have been successful in limiting the extent of the impact of COVID-19 on our communities by implementing early and vigilant social distancing measures per the guidance of the public health officials.
• The Governor of Massachusetts has:
Issued an order requiring that you protect yourself and others with a face covering/mask in public places where social distancing is not possible
− Advised that individuals practice social distancing by remaining 6 feet away from others
− Stay vigilant for symptoms and stay home if you’re sick
• If you are planning to travel here, please be advised that the Governor of Massachusetts is urging all travelers to the state to self-quarantine for 14 days through Phase 1
. Please visit Mass.gov/reopening for details and updates.