i think that the selection that is on hand is dependent on the dealer's stock &
what didn't sell at the RoadShow previous to the one you end up attending -
the RoadShow i went to recently had 2, possibly 3, 12 strings (a 656e & 456ceSLTD),
but i was more interested in the 800s & A/B'ng those to other 6 string sitka/rosewoods -
was hoping that there might be a 150e, or a prototype, but i guess they're about a month out yet
your best bet might be to call the dealer sponsoring the RoadShow to see what they
have in stock & possibly contacting the dealer where the preceding RoadShow is being
held a little before the event begins to see if anything of interest was brought along on tour