Hands-On Training sessions have computers in them, you don't need to bring your own. We have provided functionality in the conference mobile app to pre-register for these sessions this year and I would highly recommend it - they are our most popular sessions and they tend to fill up quickly. If you don't get your first choice session you can always try getting in the stand by line for each session.
If you haven't downloaded the app yet, you can find it in the iOS, Android, or Windows Phone store. Just search for "Data15" or "Tableau Conference"
Hope this helps!
Toby - thanks for the mention.
Great! Thanks so much!