Dear new students, I'm happy to know that you will start a new life at Athens this Fall. First, I love the fact that some of you could get together and connect each other before arrival. As a matter of fact, CSSA is just a nonprofit and nonpolitical organization that was built up and has been run by a number of pure volunteers. Second, about luggage. Frankly, it's kind of a complex question.
Different people favor different answers.
Don't carry too many stuff with you if you have scholarship. If you're a male student plus I tell the truth that several unused shirts are still sleeping in my luggage, you may consider not to bring too many clothes. The boring exam has hurt the brains of a lot of students. 550, the required score for the first 3 parts, is not much for you. Fortunately, the graduate Chair in my dept saved me by an exemption letter.