Great food and wine can be found right throughout SA, if you're staying in Adelaide and want to take a day trip up to the hills, there are some fantastic wineries up there. The best thing i could suggest would be to just take a drive up there, and just start calling into wineries, last time we took a day trip we were given a map that had probably 40-50 wineries on it and we just visited a few of them, before having a picnic at the Mt Lofty Botanic Gardens. I would probably steer away from any guided tours (unless you really need a driver as personally i'd prefer to visit some of the smaller wineries (if i may suggest Hahndorf Hill Wines for a great tasting experience. I'd also suggest the same with the barossa valley area, again, drive down there (probably 45minutes from the city) there's a heap of wineries down there and they're all really, really well signed. Chateau Tanunda is a great example of the caliber of wineries that can be found. Again i would steer towards the smaller wineries, all credit to the giant wineries out there, they have helped to build an industry, but some of these independent wineries are simply put, amazing. Most, if not all of the cellar door sales will offer some local fare, particularly in the way of local cheese plates and fruit. Also if you have the time there are some great wineries to be found in the Riverland (about 2&1/2 hours north of Adelaide, well northish), if i could suggest Pennyfield wines, who have a cellar door/ cafe in Berri, located right on the banks of the River Murray, a great place to loose an afternoon. Finally the best advice i could give you would be to take your time and enjoy, there really is some sensational wine areas around here, and I have completely neglected to mention any of the Limestone Coast, only because i haven't quite gotten around to visiting them yet (we keep getting stuck where we know Hope this helps, Enjoy.