It has been my experience that squeaks and creaks come and go on mine. I had two places that squeaked at different times and both have stopped now on their own. One was back by the bunks and the other by the frig. Perhaps the moving/flexing of the trailer has something to do with it. I don`t think its anything structural, more of an annoyance then anything when they squeak. Possibly the joints in the tongue and groove floor are squeaking at times when walked on.
2004 Chevy 2500HD Crew Cab 6.0l, 4.10r
2010 Jayco Jayflight 28BHS
Reese Strait Line with Dual Cam
P3 Brk controller