Most episodes of Pilot Guides (known as Globe Trekker in the USA) are filmed with a team of just five people! These are the Director and Producer (who go along for two weeks before filming to do a 'recce' - this means sussing out the people and stories and seeing what will look good and work) who are later joined by one cameraman, a sound man and the show presenter. There is often a 'fixer' who will be from the country and maybe drive the van as well.
Although there aren't many people, the preparation takes a lot, with around 4 weeks of research then 3 weeks of preparation by a researcher/producer before they even step foot in the country, speaking to tourist boards, people who run attractions, plus setting up hotels and travel arrangements.
After the shoot finishes, there will be another 3 weeks work to edit the program and do 'post production' -