Any of the 1/2 tons will pull a 5k TT, even many older ones. The comment about payload really refers to hauling a FW where all the pin weight is over the TVs rear axle. Just make sure you get a hitch installed that can carry the tongue weight and pull the max trailer weight, and weight distributing gear, and you'll be fine as long as you know how to tow. And trailer brakes, very important.
2002 Keystone Cougar 286, 8,400lbs loaded, pulled with a 2004 F150 Supercrew, 5.4, 3.73 gears. Retired and enjoying life
If that 5k is the advertised "dry" weight, then you definitely want to stay away from the mid size 1/2 tonners. And, that dry weight will be considerably more when you load it up to go camping. What is the GVWR of your new North Trail?
Any one of the big five (Ford, Chevy, Ram, Toyota, Nissan....will do the trick. However, if you "think" you might want to upgrade the trailer to a larger one prior to upgrading to a 3/4 ton truck, then I would go with the Ecoboost Ford.
Just remember that just about all of the full size (and mid size) 1/2 ton trucks are pretty limited on payload and it doesn't take much of a trailer to max one out real quick.
Ron & Sandie
'08 Safari Simba SBD35 CAT C7
Toad: 2011 GMC Terrain SLT2
Tow Bar: Sterling AT
Toad Brakes: Unified U.S. Gear
TPMS: Pressure Pro
Member of: GS, FMCA, Safari Intl, CAT