Trying to stay in the confines of the law as much as possible, I'm checking the status of various locations I've been planning on flying before I get there. I've been using a few different sites to do so, and each one has been giving me different information, some varying drastically with one another. For example, the DJI map gives a small area on Martha's Vineyard in MA as a restricted area, but Knowbeforeyoufly lists the entire island as prohibited. Which map should I go by, and why the difference?