Hey Aly,
I went on a CVW in October and I loved it! It is basically to give you a synopsis of life as a plebe at USNA. On thursday evening, I met my host and his roommates and we hung out in his room. On Friday, I went to the company workout and then attended morning classes with my host. After lunch, I went to a mandatory STEM briefing. The briefing consisted of a Q&A session and then a tour of the various engineering labs in Rickover Hall.
That particular weekend, SMT was simply a big game of ultimate frisbee! The weekend is not for USNA to evaluate you, it is simply for you to see the brigade from the eyes of a plebe. As others on these forums have said, be sure to show interest in activities. Even if it means waking up a few minutes earlier, go with your host to a morning workout. Ask lots of specific questions and don't be afraid to talk to upperclassmen. Many firsties I met had interesting reasons for their service selections.
On items to bring, you won't need much more than what they told you. It says clothing is casual, but I encourage you to dress professionally and conservatively. Many candidates wore jeans and t-shirts to class--this seemed to be fine, but I aimed to make a good impression by wearing a polo and khakis. You will also want to bring sweats and a t-shirt in case you are hanging out in your host's room on Friday night. Since your CVW is in late November, be sure to bring weather-appropriate workout gear. At night, you will be sleeping on a cot, so you probably won't want to bring bed linens. I brought a sleeping bag and a pillow and that was fine.
Overall, just relax and enjoy your time at USNA! Remember to ask lots of questions and show interest in your host's activities. Have fun!!