Past RootsTech conferences have also attracted quite a few "walk-ins" who purchase tickets at the door.
Is this the largest genealogy conference ever held in North America? I suspect it is but don't have any statistics to prove it. Does anyone remember a bigger genealogy conference in past years?
I'll be at the opening session in the morning and hope to post an article here late in the day, probably in the evening, about what happens on the first day of RootsTech 2013. In the meantime, you can find more information at http://www.rootstech.org.