I agree with Ken Winter.  Elevating the rear deck cushion to create a 
concealed storage space sounds appealing.

  This idea is consistant with Westy minimalist philosophy:  maximizing 
versitility and utility while minimizing weight and space commitment.  
Always elegant, never clumsy.

  Imagine some window cord sized line and four open eyelet "quick lace" 
loops, two on each side above the stock rear cushion height.  

  Use Instructions:  Lift rear door, attach cord to a rear loop, lace it 
forming a boxed X ending at the starting loop and tie.  Slide the cushion 
out and back in on top the boxed X.  Done.

  Total weight, probably under 6 ounces.  Commited space, both minimal 
and versitile.  You determine your concealed volume by deciding how high 
you intall your loops.  Too much lift would draw unwanted attention.  I 
think an 8" lift, allowing conventional grocery sacks to fit on edge 
would work well, but it's your bus.  RV no-slip matting would arrest 
rattles.

  But four open eyelet loops projecting into the sleeping space is a 
design defect.  I've seen small resessed spring loaded handles on movable 
objects that would solve this objection.  But I don't know a source.  
Anyone know a source for suitable non-projecting cord attachment 
hardware?