I agree with what has been suggested. If you are heading out the first part of October try to get into a good truck center for the front end alignment right away. While it is in there have them air up all your tires and check torque on all lug nuts.
After that if you drive it and there is no difference then I suppose you can weigh it and start attempting to adjust your load somewhat. Weight adjustments will be minor though because you can't move the engine, gas tank, or other heavy items like the frig.
Full Time in 2017 Newmar Ventana 4369
pulling a 24' enclosed (Mini Cooper/Harley/Kayak)
(traded 2014 Thor Challenger)
US Army 70-73 Retired LEO