Look at it this way.
Nobody ever says, man, I shoulda got a 1/2 ton, this 3/4 ton is way too much for pulling this trailer.
Think about that for a minute.
Now, I understand the whole concept of wanting to stick with what you have. I'm the world's worst at jury rigging something to do a job, that was never designed with that job in mind. I've pulled 25K lb trailers behind 3/4 ton trucks and 20K lb trailers with 1/2 ton trucks. They did the job, but over time, the work destroyed good trucks and cost me a lot of money in wasted wear and tear that the right truck for the job would have handled just fine. Stopping was something that was a suggestion, not something that could be done on demand, and I drove alone, not with my family in the truck. That way, if something went wrong, hopefully it was only me that had to pay the price. Kinda like racing cars. When I street raced, I never allowed anyone to ride with me. Too much risk, for too little reward.
By the time you beef that 1/2 ton suburban up to do the job you want it to do, then white knuckle your trips waiting for something to break and hoping nothing goes wrong stranding your family on the side of the road, or worse; you could have bought the right rig for the job.