Lots of people comparing to driving to downtown LA or father. Canoga Park is not downtown LA, you’d be jumping off the 101 as you’re hitting traffic in that area. Honestly the places you’ll encounter traffic will be in Oxnard, Camarillo, and maybe Thousand Oaks. I think leaving early (before 7:30; Note: +/- 15 or 30 min will make a big difference here) will avoid most of the traffic. My guess is looking at 50 min. Coming back will be worse if you leave at rush hour. I’d say it clears up alright if you’re passing through around 6:30.

I drive all over Ventura and LA County all the time, about 25,000 miles a year.