As a matter of fact I have weighed each tire on my toyhauler so I know what I'm carrying. You should do what you think is right, I do.
Like I said I have a max weight of 2500 lbs. on two tires out of six. The other 4 tires are at 2200 lbs. The heavier weight is under the kitchen slide, and the generator/large slide.
I discovered that there was a much harsher ride when the tires were set to max pressure, which is where I had them when I first got them. The ride smoothed out and I had less stuff being bounced around in the toyhauler at lower pressure.
The tires are rated to 3750 lbs. @ 110 psi. I'm running about 58 percent of capacity. IMO there's no reason to run at the higher pressures. I don't see how running them at max pressure is going to add to the safety factor or add to their lifespan. Running it at a lower pressure doesn't "derate" the tire, it's still a "G" rated tire. I've had them for 3 years and about 15,000 miles and they still look like new.
You do it your way and I'll do it mine. That way we're both happy.