Not clear how many days you have for the trip, is it a round trip?
Ventura to Monterey is about 275 miles if you swing thru Solvang so is doable in one day if you eat and look quick.
Hopefully you have more time for something like this;
Ventura to Santa Barbara, 22 miles, stop and look around.
On to Solvang, 51 miles for breakfast/sightsee.
On to Morro Bay, 80 miles for lunch (many shops to enjoy) and book afternoon tour for Hearsts Castle which is 34 miles farther north.
Return back south 14 miles to Cambria for the night. There are some upscale accomodations at San Simeon but Cambria is a jewel.
Cambria to Monterey is 102 miles of the most beautiful coastline anywhere!
Take your time, stop at the overlooks and just sit and enjoy. Many small art galleries, Big Sir, Pebble Beach Scenic Drive, did I mention the fabulous coastline?
Montery to Holister, 40 miles and then pick up Hwy 25 southbound. (Be sure to fuel up in Holister as fuel is scarce on this lonely road thru the foothills).
Proceed 103 miles to Parkfield for lunch (stop a Pinnacles State Park on the way).
Then its 182 miles back to Ventura if in a hurry or head over to Yosemite National Park, Lake Tahoe, or Death Valley.
Google any of the mentioned places for more info.
Come out in May and join us for our Cambria weekend http://www.bmwlt.com/forums/showthread.php?t=43237
April showers bring May flowers (global warming might be screwing this old rhyme up)
July can get warm inland but the coast is usually nice.
Keep us informed of your plans and maybe someone can meet up and ride along or join you for a meal along the way.