I think the defining feature of the tours I'm considering is how short they are. None of them will be far away from civilization. I think a Bike Friday makes good sense - and I should be able to do some short triathlons on a Pocket Rocket or NWT. If I did a half ironman then I would just rent a bike at the destination.
That folding bike directory is huge. I glanced at a few other manufacturers. Tern has some interesting models.