LIGHTS! Bring your Ott lights, either the tabletop version or the one on a stand. I've been on tons of retreats and they never have enough lighting in them. I like to bring a small garbage pail (like you would put in a small bathroom) because I'm used to a garbage pail under my sewing machine at home. You might want to bring a mat to put under your machine to help with vibration if you're going to be using the white melamine tables. If you have the room to bring a good size cutting mat, do that as you sometimes have to wait your turn at the common cutting tables. If you have bed risers to raise the common cutting tables, everyone's back will appreciate them! :thumbup:
Bring snacks to share with everyone. Paper plates, bowls and napkins help as well. A name tag is a good idea if you don't know everyone.