Hi
jmc123,
You might struggle for a reply to this one from the local brethren, as I think most local people (myself included) will be self-drive.
I have visited both areas and they're well worth it.
This site might give some ideas - if no-one posts any recommendations then I'm afraid you're left to google search to see what's out there.
If you do get to McLaren Vale then Samuel's Gorge is well worth a visit/taste.