Flew Pinedene to FABB last evening just before dark. Usually I am routed by FAWK from Shell Ultra to Pinedene station then to Babs Tower (to stay out of buffer zone) at 5500' or 6000'. Call Pinedene station and then call exit to Special East (125.40) on 124.10 abeam Babs Tower. So as it was unmanned I did same yeasterday Called inbound, Pindede station, Fly Inn (due to conflicting traffic at Fly Inn) and then at Babs on 124.10, before going 125.40. After Fly Inn around FABA I flew below a couple aeries and then at Babs one flew directly below me. All a bit close for comfort. I was doing 170+kts so closing speeds would have been high. I was at 6000' and due to smog viz was baie K@K. I think last aerie was in circuit at Babs and would thus assume was on 120.35. I did not hear any of these guys on 124.10.
I routed south of FABA and climbed from 5500 at Fly Inn to 6000 abeam Babs. I was on 124.10 until abeam Babs tower (almost overhead Babs field), then 125.40, then 133.20 (Petit traffic) then back to 125.40 and then 122.70. I did not at any time broadcast on 120.35

. I did not have the 196 with me and the KLX135A does not show much other than FAJS airspace). On the 1:250K map FABA is in WK airspace thus assumed 124.10 and Babs and SR are not shown at all.
Not looking to start a war, just want to know what the correct procedure/freq are in this area as I will be doing this route more freq in the future. I have flown the route 20+ times, but usually weekdays during the day and have never encountered traffic at these strips before. I was based at Fly Inn for a couple months so am famil with the airspace towards FAWK and FAGC, but never routed East other than direct to Petit where one would remain on 124.10 until inbound to Petit.
I have heard various guys complain that some are not on 125.40, some complain that guys are not on 124.10 and others that they are not on 120.35. The 3 strips around Babs have their own freq 120.35. Where the 3 airspaces meet (FAWK, FAJS, Spec East) you can possibly be on 124.10, 125.40 or 120.35? FABA seems to be inside WK airspace, but assume that they use 120.35 so as not to congest 124.10...
Thus a Couple Questions

What is the correct radio freq to be on when routing in this way, esp if equipped with only 1 radio.

Anyone based at Babs, SR or FABA? What is circuit alt at these strips? Easy plan gives their alts as +/-5400' and +/-5300', thus assume circuits at 6300/6400?

do you monitor 124.10 at FABA and

do you monitor 125.40 at Babs and Sierra Romeo?
Thanks in advance for comments...
