simple outdoor shower design--black barrel or shower bag for solar heated water
outdoor shower = clean up after gardening and water conservation.
Great Outdoor Shower Ideas for Refreshing Summer Time
Walk in Bamboo Shower.
Building an outdoor, gravity-fed, solar-heated shower
The business end...
This is near perfect--Earth Sheltered Homes and Berm Houses - a great cutaway view of how to set up a bermed home to allow light on each level, (front and back) as well as perfect indoor growing conditions for indoor gardens and green walls.:
Compost toilet and shower mark2 by hardworkinghippy, via Flickr