Try renting a limousine for wine tasting -- it's a lot more fun than driving yourself and a LOT less expensive than a DUI.  The best companies are those whose drivers know wine country well, not only to provide the best suggestions on which wineries you might like and where to stop for lunch, but also because most Temecula wineries have fairly strict rules about group visits.

Here are some of the companies listed on the Temecula Winegrowers Association website, which advocates safe responsible winery touring:

Executive VIP Shuttle
760 732-3175

Grapeline Wine Tours
888 894-6379

Sunset Limosine
760 723-8552

Vineyard Coast Transportation
951 303-4923

West Coast Chaffeur and Transportation
951 926-1902

Destination Temecula
800 584-8162

AALL In Limo & Party Bus
858 336-1894