Passport 2400bh or Apex 245bhs and tow question

Wow that’s awesome to hear! Even with my smaller camper, the rpm’s will climb pretty high and I see stories of these trucks running 4500+ rpm’s for extended periods hauling larger trailers, but are meant to handle it. Do you experience that kind of rpm with yours? Also, I read about rear suspension trouble after a couple years of towing. Do you have upgraded suspension or notice any premature wear? What Passport model do you own? Any gripes about it? Thanks for the info.