I stopped worrying about how many people/cars would show up years ago. I could have as much fun as I do if only 1 Monza showed up. It is a most excellent group whether or not there are 2 cars or 12. Yeah, the more the merrier but it isn't a concern that it was years ago when I really pushed and hoped for increasing numbers every year. Don't get me wrong, I really want to see 20+ cars here someday, just once at least.
Ken, I assume you have already double checked what you need to get into Canada, and, more importantly, get back into the US, with or without the kids. I know we NEED passports now, even with younger kids, but that is for us Canucks. Not sure what you could do with the kids for a couple days, we do have the pool, but obviously options are limited. You wouldn't be the first who has had a child tag along though.