Hi Candy/ How cool is that to get a wine tour like that arranged. Tell Mo hello - she is too funny. I am afraid I will NEVER live that "rice" remark down :-)
Here's the deal. We arrive in Kehl at 8:00am for the Bus sightseeing tour of Strasbourg that leaves at 8:30am, followed by a canal cruise. At approximately 11:30am, the bus takes people back to the ship for lunch (or people can chose to stay in Strasbourg for lunch on their own and shopping and come back to the ship on either a 2pm or 5pm bus shuttle.
There is an optional Wine tasting tour to Alsace being done at 1:30, but I don't think the same winery - so maybe that would be a good time for you to do your private tour?
The ship sails from Kehl at 5:45pm, so you need to be back by 5:30pm.
I hope that helps!