Tony,
Rio Minho is not possible in 2010, too little time left. I am waiting for the Club Nautico San Telmo in Tui to respond. Difficult, as I have no spanish.
I am looking at 2011, before the Morbihan Week, so the UK participants can take the direct ferry from Portsmouth to Santander and go back by road via Morbihan Week. Best of both worlds.
BTW, the Velalonga Raid Venice has just been confirmed for June 1st to 5th. 2010. All Raiders and other Swallowboaters should consider it, it's really wonderful, well worth the journey. We'll be there ourselves.