Welcome to the Southland, Bubba, and congrats on the new little one on the way! Good suggestions already, by the way... Hmm.....
If you're going to be in Camarillo, the first place that comes to mind would be the Channel Islands. I think Fletch already mentioned it, and I would have to agree, especially given that your wife is 5.5 mos. pregnant. Why not enjoy a boat ride over to Anacapa or something, hike around a bit, then take the boat home? Ferries leave from Ventura Harbor, just to the north of Camarillo on 101, then you could spend the night in downtown Ventura, which has a host of eateries. Their "main street" starts around the Ventura mission and stretches for some blocks. Great place to relax, get some food, and chill out after a day of hiking. http://www.summitpost.org/channel-islan ... ark/614674http://www.islandpackers.com/AIGeneral.html
The next logical place to the south would be the Santa Monica's. I personally haven't done Sandstone Peak, but it's known as the "peakbagger's" summit of the range, and it's supposed to have some of the best views stretching out towards the ocean.
Probably a little over an hour south (you never know with traffic) and you will find yourself in the San Gabriels. Lots of areas still closed from the Station Fire. See the map here: http://www.fs.usda.gov/Internet/FSE_DOC ... 370005.pdf
Hwy 2 leaving from La Canada will lead you up into the backcountry towards Mt. Wilson with lots of trailheads to explore. While the San Gabriels are a relatively "small" range, they are steep and rugged, which could pose a problem for wifey. Yes, there are things like Eaton Canyon here in Pasadena, which are relatively flat and cool on a summer day, but I wouldn't drive an hour south from Camarillo for that. Old Town Pasadena on Colorado Blvd. does have a myriad of places to eat, though. One "easy" peak would be San Gabriel Peak. I think it's the second tallest peak, next to Strawberry Peak (which is closed, by the way). You park just short of Mt. Wilson, walk along a fireroad (relatively flat), then hang a right and contour up to the top. http://www.summitpost.org/san-gabriel-peak/226832
You'd have to get an adventure pass for most places in the San Gabriels to put on your car, and you could get that at the Sport Chalet right when you get off the freeway on Hwy 2 (just turn AWAY from the mountain and you'll see it on your left). $5 for a day, the last time I checked. Expect about an hour to La Canada from Camarillo, then another 20-30 minutes of windy roads up to the trailhead near Mt. Wilson.
Of course, the other option (SO MANY OPTIONS!) would be to head north out of Camarillo either to Ojai or up towards Santa Barbara. Lots of short hikes in Ojai with, once again, a cute downtown with lots of places to eat.
Santa Barbara, too, has lots of little hikes to waterfalls and such, and then there's always State Street with tons of places to eat.
Personally, out of total convenience and "uniqueness," I would say a daytrip to Anacapa, if available, would take the cake. Of course, something to think about would be if you are on Anacapa.....well, you are ON there, and God forbid, you're wife has some type of emergency, that could pose a problem... but that's probably a stretch, but something to consider.
Hope that helps.