On the other hand, I've lived in Cali off and on for a total of about 10 years. Judging from the overall intellect of the average Cali HP officer, I doubt any can make a guess at what your weights are, close enough to be within a ton or two. I'm a rocket scientist and couldn't come close to making such a guess either. If you are driving carefully, in the slow lane at no more than 65 and your truck and trailer appear well matched, I'd be very surprised if you were ever pulled over for popping their regs by a couple thousand pounds. If you are driving a half ton Nissan, pulling a big ol' 25 footer, then they might get curious. I doubt they will pull out their smart phone and start researching the boat, trailer, and truck set up weights and guessing at how much fuel is in the tanks, etc.
They pretty much have their minds on moving violations and lunch.
Now, don't get all upset. I'm a big supporter of all law enforcement and they do a very difficult job for low pay and considerable danger. My point is that they aren't going to worry your total weights versus license class. Now, if you find a sign saying all vehicles towing must enter weigh station, then that is another issue.