For my trip to NJ I carried a briefcase (laptop) and two small rolling suitcases.  I check one suitcase which contains gear I can easily replace the night before (it also contains none workshop essential supplies like me extra clothes) - - the thinking here is that if the suitcase is delayed or lost I can still lead my program with the gear I carried on the plane.  The suitcase I carry on the plane is packed with teambuilding activity props.  The third and final piece of luggage I carried is a brief case for my laptop (Applie iBook).  Here is a photo of my two carry-on size suitcases.