"Furthermore, it might not be fair to the other guests to occupy the front seat for all of the game drives since others may want to trade off on that seating position."
That's putting it extremely politely. On my UA safari (which I suspect is almost identical to the K&T one), people were ADAMANT that seats had to be rotated. NO justification (health, photography, dust, view, basic discomfort) was adequate for upsetting that rotation--just like in kindergarten, everybody has to take turns.
A word to the wise.