For anyone interested in how we made the TV show while trekking, here is what we carried. Creating a legacy of an expedition is a huge plus point in favour of bringing along cameras, but it doesn't half result in a lot of kit. Our warning to anyone wanting to trek and make a TV show/film is...have a think about using a bicycle!
2 x Canon XF100 cameras – Broadcast TV quality, lightweight, reasonably unobtrusive.
5 x BP-975 batteries –amazing battery life of over 3 hours each, even in sub -20
2 x Rode NTG-1 Shotgun Microphones (plus dead cat windshield)
2 x KATA CRC-13 raincover (we tried a few different versions of raincovers, and although these weren't the heaviest duty, they were the easiest to use)
Sony Handicam Tripod (we went through a few tripods, some of which were too heavy, others which couldn't handle the cold)
12 x Sandisk Extreme CF cards, 32GB. These worked very well, though one did malfunction and need to be replaced after four months
1 x Macbook Air 11" – worked well even in the cold, no malfunctions, brilliant for backing up footage
4 x 1TB Lacie Rugged Harddrives – shock proof, worked flawlessly for backing up
2 x Casio compact cameras – great quality photos from a tiny camera
2 x GoPro cameras – for secret filming, TV quality
1 x Sony Lav Mic – essential for broadcast quality sound from a presenter/interview subject in less than perfect conditions. The one we used was not however designed for expeditions, so we had trouble with the mic wire breaking, but it did the job well
iPhone 3GS – worked amazingly well for using google maps. Some kind of GSM data is available in most medium sized towns in China. Apparently google maps works much better on iPhone 3 than iPhone 4, as iPhone 4 version is blocked by the government
In a Mongolian Ger, reading notes for next days filming and backing up footage in the corner