Clothing/Shoes/Weather Gear: Bring sturdy hiking shoes or boots. Not the huge, stiff glacier/climbing stuff unless you are keen on this, but fairly lightweight. In this terrain it is necessary to have a bit of a stiff outer sole with a grip such as the vibram make or similar. For hotel/guest house use a pair of chappals will do, or lightweight trainers.
Luggage and bags: If using pack animals and also for the flight into Jomsom, and indeed if you suspect your luggage might be roughly handled, use a strong protective bag to stuff it in. There are various qualities bags, look out for good quality ones. I am using a "Backpacker" "Pro-tective" lockable bag with absolute confidence.
Clothing/Shoes/Weather Gear: Bring a scarf or buff or something else to cover your face, especially mouth with. The winds can be fierce and flying sand is a real nuisance.