I have emailed Kern County asking the above questions plus a couple more. I didn't ask them about the SA Camp Farm but if you wanted to know more about that there is a good facebook group I found called 'Kern County of Old', maybe you could post on there or message one of the frequent users? (You'll see there are a bunch of regulars on there who obviously know a lot about local history).
Folks, I got a reply from Kern County! They didn't (couldn't?) answer all of my questions but here are the ones that they did answer. Big outtake is that B Trst actually relates to the fee for the birth certificate rather than to a trust...
* What type of identification/information was needed to receive a copy of a birth certificate? Same as now, Official picture ID adequately supporting the name signed on our statutory application for copy of said Vital Record.
* What was the process for pulling records? Vital Records are imaged on film and also by an electronic database to retrieve and copy.
* Could someone call or fax and request a record and collect it later? No
* Was this process used by the general public or mainly members of the legal profession? No
* What do the codes on the attached receipt mean? (e.g. BCOP and B.TRST) Those represents cashier codes that the total fee is split between.The statutes that support how much to charge and where the funds go have changed over the years. From the older cashier system I'm confident BCOP was probably Birth Copy and the fee is the base fee and BTRST is the portion that goes to a specific fund.
* Could an attorney pick up the document on behalf of a client and what type of ID was needed? No
* Is anyone at the courthouse from 1988 still working there and familiar with this specific request or the names Ben Perkins, the Turner family or Lori Kennedy? No
* Can you tell if the record was mailed or collected in person by looking at the receipt? No
* Would the original request documentation from 1988 be kept on file anywhere? Any record of the request would be destroyed now pursuant to statutory code.