We are staying in Nantucket for a week from June 6th-13th. We have family joining us for the week and they have never been to Martha's Vineyard. We would love to go over one morning, explore a bit for the day, and come home that late afternoon/evening. Is that a possibility? It looks like the high-speed ferry only makes one trip a day each way. Cape Air's schedules don't seem to line up. Is there another private means of getting between islands? Just want to make sure I've explored all our options before I give up on getting to Martha's Vineyard!