OK, to clear up any misconceptions:
I posted up to see where we wanted to have this not realizing this event is tied directly to the adopt a trail program. It was no matter though as the consensus was it has to stay in Big Bear, my bad on that one, I should have known that.
So after that it was posted up that there is a problem with Serrano campground not being able to take reservations due to some sort of contract dispute.
So that leaves us with:
It will be in Big Bear as always
We need to find a suitable (restrooms, showers etc.) campground to use.
If anybody knows of a good campground in the area please post up about it. We still need to figure this out. The dates are still May 18-20 at this point.