One thing to mention about field producers during filming.
WRP (Bert, Elise, and company travel with the Race during filming and from what I've understood, they trying to cover the main tasks and pit stop traveling separately from Phil and the Racers. Phil also wears a producer hat, mostly for his stand-ups and perhaps the pit stops if the main production team has to get ahead to the locations for the following leg(s). Then there are local producers in each country that get that leg and its tasks set up for filming. They could be locals, could be based with WRP, or are hired from other places to come in and handle certain locations for the filming. (Remember the local producer who died in Uganda a year or so back? He was brought in to help set up and film the Malawi legs a couple of Racers ago and was based in South Africa, IIRC. Although his death wasn't when he was helping WRP, he was an example of a producer that helps out in a particular country for filiming.)