These are great suggestions. I too have had items disappear at classes and UFO nights. When my friends used to come to my house to sew, I would tell them to bring their machines, thread, and fabric. I would provide everything else. This way, I wouldn't have to be responsible for getting their tools back to them if they forgot and they would not have to worry about taking something of mine. It worked pretty good. It was also nice not to have to worry about packing up everything from our own sewing room each time we could go to each others' houses to sew.