The Goodyear endurance tires do have a load inflation table unlike many trailer tires.
http://www.rvtiresafety.net/search/label/Goodyear%20Endurance
In my case using the trailer manufacturers spec of 65psi on my new 235/80/16 lre endurance tires still gives me almost an additional 400lbs per tire of load capacity instead of the max rating of 3420 at 80psi(though according to the table I could go as low as 45psi based on my weight). I did upgrade my tires from 225/75/15 lrd. I personally prefer not to run any higher pressure than needed including a safety margin just to keep the trailer from bouncing around any rougher than it needs to. Same with my TV I run the pressure required for the load. With that being said at this point in time I am not sure I am comfortable running 45 psi on the trailer with these tires though as I get some more miles on them and see how it handles and tire wear I may lower it from the 65 psi down to 60 or perhaps even 55.