I am planning a family reunion for approx 20 people in late July. We would like to stay on the southern coast of Maine for a long weekend. We will probably fly into Boston. We would like to stay in or near a quaint beach town. Most accommodations I am viewing online are very expensive and are rented by the week only. We like having a big room/kitchen for having meals together. We range in age from 4-75. I appreciate any recommendations!