People joked about my use of the lens cap keepers and, for lenses when those aren't practical, my use of the thingy attached to my belt that holds the lens cap on the belt. Once I began using them, I don't ever remember losing a lens cap. Before using those items, I was constantly dropping the lens caps or setting them down and walking away from them.I lose them more than I use them.
FWIW......I have used Lens Coat hoodies for years on my 14-24mm, 500 and 600mm lenses. Love them! Hard bottom protects lens, even in the bag. Neoprene stretches so its easy to take on and off. AND - I can stuff it in a pocket when I am shooting. I select the camo pattern to match my other gear coverings. I do take and use the lens hood in the field to control stray light hitting the lens glass when shooting.No clear ffilters - lens cap except for shooting. Actually, with my long lenses I leave the lens hood in the car when I venture out. With shorter lenses that have an actual plastic cap I keep the cap on till I am set to shoot.