That is a LONG trailer for that vehicle, and combining it with you being that close to the max weight allowed for it.....I just pray and hope that you are careful and keep the speed down.
I moved from a 2010 Screw F150 4X4 with the longest wheelbase Ford makes to a 2012 Scab 4X4 with the shorter wheelbase and noticed a huge difference when towing in crosswinds. And, my truck is rated to tow 11,300 pounds and I am only towing 70% of that allowed weight.
The closer you get to the maximum allowed, the less safety margin you are going to have.
Stay safe, my friend.
Glenn and Cheryle- loving retirement
2012 Denali 289RK
2012 F150 4X4 Ecoboost Max Tow