I started out with a pair of shower curtains hanging from a hula-hoop on the ceiling, as shown in
my video with Bob Wells. But the curtain was mostly in the way and wouldn't dry folded up. So I got rid of it as it was mostly a nuisance.
How much splashing might be a problem depends on (1) how close by your "stuff" is (2) how much a problem the "stuff" getting wet might be, and (how good your shower head is at putting water on your skin instead of bouncing it off your skin.
My showerhead has lots of holes that put out a spray just strong enough to reach me well, and I'm careful about where I point it. I run water just long enough to get every spot of me wet. Then I rub Castle Soap into my hair, and repeatedly rub a brush around in my hair to make the brush sudsy, then brush a part of my body, then brush around in my hair again, then take the sudsy brush to another part of my body, thus removing oil and dirt from my skin one spot at a time (not to mention the great shampoo treatment returning the brush to my hair each time provides). Then I run the water again, starting at the top of me and rinsing down to my feet, keeping the spray on each spot just long enough to rinse soap, oil, and dirt away.
Then I step out of the tub with the drain open and hanging over the side footwell. I lift up the tub so the water pours into the footwell through the drain and out under the door. Holding the tub up still facing the door, I quickly spray the inside of it out. Then fold up the tub and tuck it away. Then I wipe up the few small puddles on my linoleum floor with a cloth towel, and hang that towel on a ceiling hook to dry.
Be sure your hand-held shower head is gentle with the water (and made for RVs),
not a hard spray (because that would send water droplets everywhere as they bounced off your skin uncontrollably), and have a way to turn the water off any time it's not aimed exactly where you want the water to go.
