Brilliant! We will be travelling with a 3 1/2 year old and an almost 2 year old. The original plan was to pop them in a trailer (we've got something similar to yours) but some people who had toured with kids suggested getting a tandem as the kids can get bored, especially when older...
My original idea was to go with a childback tandem from Thorn as they suggested this would handle pretty much like a single when my older kid is tired and wants to go in the trailer with his little brother. More recently people have suggested that a tandem trike will work better as it's more stable... Not sure at all now, but am tending towards the trike...
Of course, now my wife wants to stoke the trike and stick both kids in the trailer, so we're back to where we started. We don't leave until Oct 2004 so plenty of time to sort things out.
What is your itinery (sp?)?