This site is for discussion of travel to the "Land of Port & Madeira" as well as food related to Port or Portugal. Additionally your Offline tasting events can be planned and reviewed here.
I just saw that there is a company running Stand Up Paddle trips in Douro. It looks like they are doing the trip about an hour up river from Porto, about half way between Porto and the beginning of the demarcated area of the Douro. I might try it sometime!