What fun, I love retreats and three days is perfect. Though, I usually don't sew much the 3 days. The retreats I have been on have had a national teacher teaching a pattern. The last one had Marti Michel, it was great. One cool idea I saw was a quilter who had fun business cards made up to hand out to new friends. Just a reminder of emails, phone numbers and cities. Take your own chair or at least a cushion. I like to work on precut projects and get them done. Something that is alot of sewing, not much cutting and not complicated. Be prepared by having hand sewing if you like to do that. Most of the ones I have seen don't want anyone to bring an iron. The are huge power draws. And there are ironing stations set up. I have seen mini irons next to people with mobility problems. Take chocolate to share. You'll enjoy it more and make lots of new friends.