In my camera bags, with a few bags of silica gel in there. Always have. All my gear has always been mint. Camera bags are more than adequate to protect them for storage and not in use. I'd only consider a pelicase or similar when transporting the larger lenses in checked in baggage on flights. Ordinarily, Longer lenses are kept in my lowepro rucksack, and smaller lenses in my Gladstone 11a bag.