I go on retreat about 2 times a year. I plan for 1 or 2 projects per day, bring them all cut out and bagged with labels as to what they are. Cutting matt, rotary cutter, seam ripper, sewing machine (and foot pedal), iron, pressing matt, a 6" x 12" ruler and a 12 1/2" square ruler, extra blades & needles, thread and any other items you use in your daily sewing. Prewind a stack of bobbins, and make copies of the patterns you are working on so you can mark off the steps as you complete them (helps you find where you were after break). Lots of snacks (healthy if possible), comfy clothes, jammies, medication you take and your personal items. The first time or two I went on retreat I hauled half my sewing room, didn't use most of it and had to haul in and back out so streamlined the process. Most of all have fun, relax, sew, laugh, eat, and make great memories.
Peace, Brenda