Buyers yes, they can register the day of the event to attend but vendors like RNVO must be registered months in advance. the trade shows are too big to set up for the opening day of the convention. They will also be in the worst area of the exibition sales floor. the majors are already positioned best, years ago. i've been to many conventions at the sands expo its huge! many vendors will tell you they don't do much business there but make new contacts. i'm a Rnvo share holder with you all but only short term