An island in a dream often represents a chosen or unchosen distance from other people -- a need for independence, or a loneliness that's crept in without you fully noticing. A peaceful island can reflect welcome refuge, while one that feels stranding suggests the isolation has gone further than you actually wanted.
Planets in fixed signs show the matter durable; in bicorporeal signs, doubtful; in movable, convertible to good or evil. - William Lilly (1602.-1681.)