I towed my 4000 pound trailer with a 1/2 when we first bought it,, I quickly found out that with all of our stuff,family and dog,, we quickly ran out of room and carrying capacity. The truck could tow it no problem and it could stop it no problem.
But as far as reaching it's capacity,we met that and sometimes exceeded that!
Not all of our trips are Fully Loaded,, I like to crab,have an inflatable boat,six commercial crab traps,outboard motor and a breakdown trailer that fits in a full sized truck bed,along with firewood,generator,fuel,Etc.
Although my half ton was a short bed we could make the trip..
crunching numbers was a different story and being a commercial truck driver I wasn't comfortable with that.
We upgraded to a 3/4 ton HD and never looked back!! Getting groceries in ti is a different story,, uses more gas, harsher ride,longer bed,,, but its about the goal of Why I have a 3/4 ton, and peace of mind makes up for all the rest..