Welcome to the forum. A "special issue" with almost every Keystone trailer (and likely Forest River also) is the tires. Almost all RV manufacturers use "Chinese may pops" as OEM tires. Many are "at or very near" the load limit and after a year are "substandard" to carry the load. So, even if the trailer is "premier" (brand or condition) check the tires and expect to replace them if you really want any "confidence while towing".....
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS