Off the beaten path wineries and restaurants near Los Olivos?

I would also recommend heading out to Foxen Vineyard.They make great juice, and the tasting room is pretty much a shack off the side of the road which makes it awesome in my book. 

The drive out Foxen Canyon Rd is beautiful. Lunch at the bar at Los Olivos Wine Merchant Cafe is always great and you can pick up a couple nice bottles too. One of my favorites. Have fun!

Saarloos And Sons Tasting Room is my favorite place to go in Los Olivos. It's a ton of fun, great wine, and you can do cupcake tasking too.

If you liked the Hitching Post II check out Cold Spring Tavern on the weekend and enjoy the best tri-tip steak sandwich ever!

I recommend you pop over to Lompoc for tasting Turiya Wines (by appt only) , Jalama Wines and Tyler Tasting Room... stop for a meal Industrial Eats in Buellton on your way.

Not sure if  you've made it very far past Firestone Vineyard but if you keep going along that road there are some of my favorite wineries in the area... Foxen Vineyard makes amazing wine, and their tasting room is a rustic barn on the side of the road in an awesome setting.  Next up is Zaca Mesa Winery & Vineyard which has pretty good wine in a cool spot, then continue on to Rancho Sisquoc Winery which is a very charming place in a really cool setting.  There are more wineries along the road, but those all have beautiful settings and Foxen and Rancho Sisquoc have great character.  The road itself they are along is a gorgeous drive as well.  

Other wineries that I like between Solvang and Los Olivos:  Blackjack Ranch and Rusack Vineyards.

Other wineries that make good wine are Melville Winery, Sanford Winery, Babcock Winery & Vineyards and Foley Estate Winery.

Finally, a place that's wines may not be as good as some of the others I noted, but is a very fun place (especially to end a day of wine tasting) is Kalyra Winery.

Food-wise, Los Olivos itself is extremely charming and has some nice places to eat:

• High end:  Los Olivos Wine Merchant Cafe or Petros
• Casual:  Panino makes amazing sandwiches (right on the corner in downtown Los Olivos) and the R Country Market has great trip tip sandwiches (on weekends).
  
  

Santa Ynez:  Grappolo is excellent (Italian)

Ballard:  The Ballard Inn and Restaurant restaurant is very good (more of a quite, romantic place)

 Solvang:  Succulent Cafe & Trading Company is really good and if you want traditional Danish pastries (get a kringle), Olsen's Danish Village Bakery & Coffee Shop is the best in town.

I second Angela's Industrial Eats mention. That place is delicious for both vegetarians and meat eaters. And Sides Hardware and Shoes a Brothers Restaurant in downtown Los Olivos has amazing eats too, within easy walking distance of a lot of the tasting rooms. You'll definitely need a reservation for dinner, but you can luck out for lunch sometimes.

When in Los Olivos proper, I like to taste at Kaena Wine Co, Alta Maria Vineyards and tercero wines. Kaena Wine Co has beautiful grenache and blends, Alta Maria Vineyards has a tasty cab and pinot, and tercero wines is a surprising treat, especially if Larry the winemaker is there. Sometimes he even bakes homemade breads designed to pair with his wines!