I have a few torque wrenchs, but I have never used any of them on any of my tires including the Trailer Tires. I do check them to make sure they are tight with a regular lug wrench. I would recommend you have the correct lug wrench for your Trailer in the event you have a blow-out or need to change tires and to check the lugs.
I use my torque wrenchs on such things as my Equal-i-zer system when I need to clean and lube it.
HAPPY CAMPING!! :D
Daryl and Sandy
2013 Eagle 314BDS
2014 Ford F150 Platinum, 4 x 4 Crew Cab with Ecoboost