Folks,
For an answer (if EASA/CAA would accept it) have a look at the Australia CASR 21.189, Limited Cat. C.of A, and associated ACs.
The starting point is:
http://www.casa.gov.au/rules/1998casr/021/021casr.pdf
It all works very well, and is now community administered, rather than by CASA, as most of Sports and Recreational is already administered.
Note that NO AOC is required for "Adventure Flights".
Tootle pip!!