Make a checklist before you leave and check off the items as you pack. I usually bring projects that don't really need high levels of concentration because there is lots of talking, laughing and other "interruptions". Label all of your items. There may not be formal presentations, but at my guild retreats there are always people gathered around others learning new things! I know it was mentioned but the most important things are all the accessories you need for your machine, a pillow or two to sit on, a good light.. Bring hand projects also if you tire of sewing. Some people actually bring their cross stitch or knitting... bring some snacks... water bottle...exedrin. enjoy. you will love it.