I go to 1 retreat every year in October. It was formed about 8 years ago from a couple online quilting sites. We have a ball and set up a few things to do for classes and fun & games. Unfortunately, I have to fly every year, but those that drive always bring their sewing machines, tools and sometimes and iron & ironing board since the retreat center we attend doesn't usually have them. So it can't hurt to bring an iron & small ironing board. If you don't need them, they stay in the car, no harm done. You are going to have a ball and meet new friends.
Let us know how it goes.