A tip for users of #piwik #analytics — if you want to use campaigns, but don't want to clutter things up with bothersome URL parameters (which would, for example, make a QR Code a lot bigger), just set up a server redirect/alias that redirects from some shortened URL e.g redirect:
to
waterpigs.co.uk/lutherie/catalogue/dulcimers/D4?pk_campaign=ads&pk_kwd=catalogue
(Real example) then use the shorter URL on your actual advertising . It's a bit of a cheat, but works nicely. #webdesign #server #http #apache