Is it possible that it was the companion problem to underinflation; overloading? If it is a tire heating issue, and your pressure is good, you may be overloading the tires. Take an honest look at how much weight you have in your TT. (spoken with the voice of experience).
2011 Jayco X19H (purchased 2015)
2008 Jayco 1007 PUP (purchased new, traded for the X19)
2012 Chev Traverse LT with TP