Hi VectisLast year I bought a ticket but spent most of my time in the Endeavour (Jim Mageean's maritime sessions), the Plough (there are official singarounds upstairs lunchtime and evening but bar sessions downstairs as well) and Tap and Spile.
Your knee might have a bit of trouble with all the ups and downs (as McGrath has pointed out in Kippers by Post Whitby is that sort of a town). The Plough and Tap and Spile are close together on the West cliff side of the river, and the Endeavour is on the East cliff side near a car park. It's reasonably flat crossing from the east to the west over the swing bridge.
Parking was awful last year because the festival coincided with the regatta - but not this year.
I think I might have a lift up to Whitby, but not back to London again.....
Kitty