You probably have enough time to plant anything but your melons: certainly enough time for cowpeas, beans, peppers, iciban eggplant, and tomatoes. This fall you can do all greens, early peas, snow peas, set onions, etc. - it will make a difference if you are in L A* or North 'Bama - call the local Co-Op when you arrive and they can tell you what works. IF there is a chance for frequent moves, you can plant a lot of stuff in containers and then you can take it with you. Good luck.
*LA = Lower Alabama