All my close quilting buddies live a long way from here, so I often go to workshops (and also retreats) on my own. It has never been a problem. After all, we all have a lot in common (large fabric stash, at least 5 or six rotary cutters, a collection of sewing machines, heaven only knows how many quilting books, a constant craving for chocolate, .......)
The only thing I will insist on, and gladly pay the extra money for: A room I don't have to share with others. I like a little privacy, even though I'm quite extrovert by nature.
Going just a tiny bit off on a tangent: After getting divorced years ago, I found it quite amazing how many people just will not do anything or go anywhere on their own. They would rather stay at home. I'm not prepared to limit my horizon and the opportunities to experience new things because I'm on my own. So, I'll do anything I want to. I would draw the line at 'wing-walking' or cage fighting. Giggle......
Please, please, go on that retreat. You'll love it! And then tell us all about it. We are a very inquisitive lot.