Tons of towing threads on here (search), most are 1500 drivers hoping they will be ok. Lots of "emotions" on both sides... Everybody's situations are different but it only takes one time to really F things up when you have pushed the envelope too far.
If you have hills/mts then watch it as far as tranny temps and braking down the other side. Otherwise mainly drop your speed and do the basic things like E rated tires, a more costly WDH with proper sway control and scale your combo so that your % tongue weight or 5ver pin weight is known.
Most 2015+ trucks of any brand have the motor to pull, but what's questionable is the rear axle/tires/braking. Don't get fooled by the ever increasing "can tow xx,xxx pounds" ads. After all, the Tundra "towed" the space shuttle a few years back. It's one thing to tow 5-6 times a year on relatively flat/lower hill roads and get your water/other things near where you are camping (to save weight). It's another to be out there 15-20 times a year and be towing "big".
In general if you don't already have a truck, buy the trailer you want first then get the truck that will safely tow it. Unfortunately, most already have the truck (usually a 150/1500) and overbuy on the trailer. RV salespeople are very good at convincing you that your truck can safely tow their product. Best of luck on your decisions.
This guy covers it pretty well:
How Much Can I Tow? - Towing & Payload Capacity Explained
Edit - I just added another very good explanation of trailer towing terms:
PAYLOAD PROBLEMS: HOW MUCH CAN I (REALLY) TOW?