LanceRKeys wrote:
Hitch up and go. You’ll know after a few tanks of fuel if it will tow it or not. You’ve already spent the money, go enjoy it. If you find you truck isn’t quite up to the task, get a bigger truck, no big deal.
I would say that this largely captures it ^^^^^.
If that doesn't capture it, then go (as slow as you can / want to) to the nearest CAT scale and get the truck/trailer combination weighed in an as-loaded for camping condition.
Check the weights against the published GVWR/GCVWR/Tongue numbers (plus whatever other numbers might apply). If the weights are over, only the OP can decide how much over is acceptable or not.
If I were starting from a blank sheet of paper, I like to be well within the numbers. Life doesn't always deliver a blank sheet of paper so I've done what LanceRKeys suggested and used the "numbers don't add up" combo to whatever degree I felt was safely in control for the drive.
FWIW, I would look at LT tires and double check the hitch rating (as printed on your receive).....