We took the just the blowhole tour in April without the winery tour. When I first looked online it was not available but when we got on the ship it was.
It was basically a 45 minute bus ride each way. The tour director on the bus gave some history of Ensenada along the way and gave us some shopping tips for the flea market once we got there. After that we only had about 45 minutes to view the blowhole and shop. Alot of the stuff they have at the flea market you can buy at the port for the same price or less. If you are really into flea market shopping you won't really have enough time. It doesn't take long to view the blow hole and take a few pictures.
I have some pictures if you want to see you can e-mail me at Hntrtr@aol.com
If I had the option to do it again, I would probably pass.