I went to a gathering of chainsaw afficianados last weekend. I had a very nice camping spot. After running my saw a bit, I needed to clean up. So, I heated up water, put the Zodi battery operated shower suction end in the water, and pushed the button. Nothing happened. I was just about to reclothe and put in new batteries when I noticed that the showerhead worked at waist level, but didn't have the power to push the water up higher. So, I made do.
I guess I will need to build a stout bucket holder so there will be more help from gravity.
I have forgotton the formula for drops in water pressure as one pumps it up a hill through firehose. I did find myself thinking about pump relays....(wildland fire memories) and pumping it up to a portatank where another pump would pump it on up....ENOUGH!

So, I shall be pondering a contraption to hold the five gallon bucket at more of an elevation. There's no way I'll trust the little hook on the shower tent.