I keep a 6oz bottle of Lemon Joy in my travel bag: you can wash anything in that stuff, even in saltwater (hair/body/clothes/dishes/-anything). It might not be the 'perfect product' for some purposes but it's the best jack-of-all-trades soap I've used and if I only have space for one soap, it's going to be Lemon Joy. As far as washing clothes, soap up while wearing them in the shower, even if it's an outdoor shower devised from hanging a bag of water from a tree limb.