DS will be 5 and DD will be 2 1/2. We are going in January 2010. I have a Mac Twin Rally and a BJCSD. We are driving, so there are no airline issues and we will make room for either one in the car (we are probably also going to have our quest). I have no idea where we are staying yet. If I don't end up bringing the BJCSD I am going to be selling it as I don't really need an AT double any longer. Which one would you bring? I know DD will ride in the stroller. I assume DS (at 5) will get tired and want to ride at some point daily.