How about helping out at the Great River Race,
Cruise the Thames from Kingston to Grenwich ( early morning, mist on the water, beautiful )
Tie up at Mast House Terrace Pier, have a sausage sandwich and cruise back to Kingston in the company of 3000 mad rowers in all sorts of craft
Recover boat and go home
Did I mention pre-event curry the night before and free camping.
Oh and we'll pay the boat fuel and transport costs for getting to and from the event.... and there's normally lots of Jaffa Cakes too.
Sign up here 2015 Great River Race – 12th September