So how is it, travelling with small kids?

Fun, but not always so easy!
The main thing is that we cannot do so much as we would do on our own, and of course the kids are not so interested in sight-seeing - they just want to play. They get hungry and thirsty at different times, so more stops are needed.
Fiona turns out to be a very good traveller - rarely complains, eats well, LOVES tuktuks, and even she didn't want to leave the Grand Palace in Bangkok she was having so much fun running around (she believed princesses live there and we weren't going to shatter her illusions and tell her it's just boring old monks). Briana, despite being older, is harder work - she has got a bit homesick, is more picky about her food, and yesterday was looking a bit pale - on the other hand yesterday she also said she wants to live here, so let's see!

In our first room in Bangkok we had a big double bed and a single bed - the kids shared the single bed. The first night Briana didn't want to share, so that took a bit of persuasion. It was funny to see them in the morning literally lying on top of each other. After that, they now really want to sleep together. However now in Chiang Mai we have two smallish double beds and for the first night we slept with one adult and one child in each bed. I imagine we will do lots of bed-hopping before the trip is over!