Then as long as the camera bag has the usual/adequate padding, I don't see any point in putting the lenses in 'extra' pouches. I take it that you will not be putting your camera bag into an aircraft hold but (if you are flying) will keep it with you as hand luggage? I don't think a pouch will offer much protection from a baggage handler. If you haven't got room in your hand luggage, then slipping a lens into a pouch before dropping it into a pocket might not be a bad idea.lenses will be kept in my camera bag!
When I use pouches, that is what I use . I also find a pouch strapped/clipped to a bag can make for faster lens swapping.Lowepro pouches! not only will they protect but they slip onto your belt for easy carrying etc (sliplock system)