Careful with the information on this forum.
Alot of people full time and put tens of thousands of miles on each year on their tow vehicles. And can afford to drive the big trucks daily.
I've just purchased a 2014 F150 Screw EB 4x4 W/HD payload package. My trailer weighs 6400# ready to camp. My old truck (see below), had no issues whatsoever towing it. I've put ~20,000kms towing on it, through the mountains, and it had NO issues whatsoever. However, the maintenance is getting old. Basically for what I've paid recently (brakes/tires/oil cooler lines/front end) I would've had payments covered for a year. Hence the new EB.
My truck typically sits the majority of time in the winter, but does get used occasionally for work, but I do shuttle the kids around quite often to sports/etc, during the week. The dismal mpg/ride of a 3/4 ton has also gotten old.
If you truly only plan to tow 5% of the time with the truck, you'll be hating the poor mpg of a 3/4t or 1t.
Is a 3/4t or 1t a better tool for towing, YES.
But there are lots of 1/2t that can tow your trailer properly and safely.
Oh, and another thing to consider, daily driving a 3/4t of 1t truck, is you'll never fit in parkades (height).
Yes.. I know I'll get flamed for these comments, but you need to weigh the pros/cons of each truck, and decide which pros/cons are a priority FOR YOU.