Hi - that refugio shower scramble; problems of privacy, queues, will there be enough hot water, what to do with your bags, etc ... the thing is, you don't have to do it. A daily bath or shower - sometimes twice daily - is a very modern habit, promoted by producers of bathroom products and believing that false hype can verge on neurosis.
Our skin is our largest organ and is designed to exude oils and help the nurture of beneficial bacteria to protect us from external invasions - it is there to keep us healthy.
Every time we shower, if we use chemical products, we strip all of that away, leaving the body defenceless, and this is not a good thing to do at all.
We have five places where our bodies produce secretions that will smell after a few days. Armpits, feet, groin. If we gently soapy wash those parts (with a gentle soap) using a flannel then we will always smell sweet, the rest of the body can be rubbed down with clear water.
And this makes refugios really simple. If you carry a light collapsible bucket you can take it with you into the WC cubicle and clean yourself easily and simply, in total privacy, whenever you want. You can even do it behind a bush by a stream!
The Romans knew the benefits of healthy skin. Their method was to rub their skin all over with olive oil, use a strigil to scrape it off, and then plunge into a hot bath, then a cooler one. Soap didn't even exist.
Both men and women with long hair say they have problems if they stop washing their hair, and this is true as they constantly wash it with chemicals, stripping out all the oils and use a conditioner to try and replace them, so if they stop their hair goes frizzy - but, for thousands and thousands of years women didn't regularly wash their hair, instead they regularly brushed it. Think of all those female aristocrats sitting down having their hair brushed by a servant in films. The scalp produces oils specific to healthy hair and by regular long brushing this is moved to all of the hair, giving a beautiful healthy glow. (Gets rid of the split ends problem too).
I never take a bath and only shower about once every few months, without chemicals, but I do soapy wash smell producing areas and clear wash my skin daily. I have really healthy supple smooth skin and, no, I don't smell!
This constant showering and hair washing - it is habit, a consumer habit produced by adverts from bathroom product companies and, honestly, not only is it not necessary it is actually harmful to you as it strips away your body's defences. Their is a difference between cleanliness and sterility. "In cleanliness there is bacterial activity, there is life. Without bacteria there would be no life."
So - a different viewpoint .. but think about it! Carry a lightweight folding bucket and the whole shower saga in a refugio is over, gone, forever - and you will be much healthier too - win-win, don't you think?