Their main priority is to make an entertaining TV show, so they're probably given suggested activities by the producers and some of it will be arranged in advance. Just watching them sit on a bus for the whole hour wouldn't make great TV
I quite like all the pairs now, especially Betty and James and the boys. I think the siblings especially come across as really respectful of the locals, like last week when they had the passport crisis, they still went out of their way to apologise to their hosts for being late for dinner