If you're driving, I even once took a spare machine to a retreat. It was a 3 day retreat and I wanted to make certain that i had everything. I had fabric in tubs in the trunk and my supplies and machines in the car. I didn't need them but it was nice to know they were there. It also would have been handy to have some business cards made up with my name, address, email and phone number. I made some new friends and we quickly exchanged names on the last day. A card would have been nice to hand out. Not that I'm a business, just a new friend.