When we were in Orlando last summer they had large selection of vans on the aisle. They had Montanas, Ventures, Astros and Grand Caravans as well. I didn't see any Rendezvous there at the time. I don't know a lot about the Rendezvous but I do know that if you are using all 7 seats (i.e. the 3rd row) there is not very much room for luggage. I do know that the Rendezvous is based on the same chasis length as the short wheelbase GM minivans, whereas the minivans I saw were the extended length models.
Whats nice about the way Emerald Reserve set up is that you can open up the cars and scope out the luggage space before you drive off in it. If one car doesn't seem to have enough space, you can move onto the next before you drive away.