i would wear casual cotton pants a casual shirt and a jacket or zipfront sweatshirt for embarkation. You will need light slacks and a jacket,sweater or sweatshirt for the first day -you won't hit the warmer weather until you reach the Carolina's at the earliest.
For dinner - Casual Nights - Dockers type pants w/polo or short -sleeve collared shirt,casual shoes for the men and boys. - Casual Nights- capris with a nice top, sheath or sundress w/sweater, docker's type pants and a nice blouse, nice skirt & blouse, flat sandals for the women and girls.