sjgostovich:
Unit call signs:
31-XX Ventura Office
24-XX Santa Barbara Office
54-XX Moorpark Office
For now, the Ventura county area is in transition from the old Purple to the new Purple-2 Coastal. You can hear both Purple channels on either 42.40(B), 42.16(M); PL 167.9, or, the new Purple-2 on 45.4 (B), 42.76 (M); PL 151.4. Both channels may operate in the repeater mode, however, from my distant location I have not heard the repeat mode used on either channel for a week or so. Since you will be in Ventura, you may hear the system operating in repeater mode.
Try the the old Blue, 42.34 (B), 42.18 (M); PL 167.9. The new Blue-2 Coastal may be implemented during your stay so be prepared for the following: 44.92 (B) or possibly 44.66 (B), 42.4 (M); PL 151.4. Note that one of the new Blue-2 channels requires abandonment of the old Purple. Sorry, I don't have a clue what mobile frequency 44.92 will be paired with.
You may want to listen to Santa Barbara units on the Green, 42.54 (B), 42.24 (M); PL167.9, or, possibly they may have switched to the new Green-2 at 44.88; PL 151.4. Alternatively, Santa Barbara may be assigned to the new Coastal Lime, 45.28 (B), 42.72 (M); PL 151.4. In the past few month's I have heard occasional traffic on that channel which sounds like traffic accident investigations. Note that implementation of the Coastal Lime requires abandonment of the old White channel that currently serves Buelton and San Luis Obispo (those areas are further up the coast).
Also, try CHP on UHF 460.375 and 460.45; PL 127 for special units and other state agencies. I can't help you with the new VRS 700 Mhz system as I'm too far away to hear those frequencies. Perhaps another member knows that information. Mobile Extenders may be on 154.905 Mhz.
Good luck !