As this was my first event, I did not bring all things needed. Luckily, my table partner was great and gave me what I needed. I will definitely be prepared for the next event, and yes I plan to go again in Oct and Jan. In fact, I am planning the next set of projects. It is a great time to get one's UFO's done and I have plenty of them to chose from.
If you haven't done a retreat - I suggest you find one and take the plunge. Even if you do not know the other attendees, you will when the event is over. Just go and have fun.