Looking forward to OD. Our OD group gets bigger every year. We have 24 people meeting at my house and we've rented a small bus. We are in groups of 12, 8, and 4. Next year I'm buying group tickets so we can all sit together. I suspect I will put together a group of 30 or so next year.
I'm going the other way, last year I had a group in the 30s and this year it dropped to 22. I've done the group sale thing a couple times and it gets me a few rows closer to the field but it's not worth the hassle so unless I get a double the demand next year I'm going back to individual ticket sales.