State Parks allows priority booking for returning user groups from Memorial Day weekend through Labor Day. Any user group may request to be added to the summer mailing list for an opportunity to book dates with priority groups. Letters are sent out in March to the mailing list and groups have until the end of April to submit their requested dates. Requests are processed by order of seniority and then by postmark date. Being on the mailing list is not a guarantee that your requested dates will be booked for any group.