Zigzag shelf - by TDSpade @ LumberJocks.com ~ woodworking community. Would be a terrific idea for a child's room, painted white etc.
Murphy twin plus desk - more shelves could go above it.
DIY Murphy bed. This would have been awesome when we were still in the apartment!
DIY wall bed for under $150 (bed is around $75, shelves make up the rest)
modern bunk beds design | 15 Modern And Cool Kids Bunk Bed Designs | Kidsomania
FREE tutorial for the diy bunk bed loft with reading room / playhouse beneath! DIY loft bed for kids! From Outstanding to Easy: 20 DIY Toddler Beds
murphy bunk bed plans | murphy+bed+bunk+bed+blue.jpg
Great bunks. And I love the bedding folded at the foot of the bed. (It is not easy to make bunk beds!)
If you have the wall space in your RV gain two extra sleeping spots, with this space saving Bunk Bed Gadget. I'm thinking wall in garage of toy hauler RV separating living area.
Website for lots of easy to follow plans, like this one for a murphy bed for a guest bedroom (which would then double as my craft room!!!)