Sorry, long post...
Your set up looks pretty good, even at max rating of the trailer.
As long as you cinch up your straps every few hundred miles, keep an eye on her in your rear view, and no trailer sway ..... and carry a spare tire for the trailer. Especially since your rolling at max rating for the trailer.
The biggest issue I've had trailering flat beds with equipment on them, (once I get the tongue weight right), or toyhauler travel trailers.... is tires. Most trailers of any type, come new from the factory with what are known as "China bombs". Which are Chinese trailer tires.
I run the best trailer tires I can find. Recently it's Goodyear brand. And I replace them every 4 years on trailers I do long runs with. No matter how good they look!
Since you're at max capacity on your trailer, I'd recommend setting your PSI at about 90 percent of the tires rating. Not 100 percent, because the tires heat up as you roll. And the air expands. Unless its zero degrees outside.
The best luck I've had on NOT-maxed-out capacity trailers. Is 65 to 70 psi on 80 psi max rated tires.
If your tires are old, do not run max psi. You'll risk blowing the tread off the tires. Don't ask me how I know.... it was a bad day. Or actually 2 days of anguish... blew 2 tires in less than 1/2 a mile. I now try to carry 2 spares.