IMO,
It is good to get others experience, but to put it all in context, a lot of info is needed:

- Engine size
- Truck weight
- Trailer and car weight
- Rear end gear ratio
- Road grade (incline) flat, hills, mountains
- Elevation (300 ft, or 9000 ft Rockys)
- Fuel mileage while towing
- Brake size, what do you think if a Hundai cuts you off and slams on the brakes, down hill...?

You might get away with a "small" truck on flat roads, at low speeds, with no traffic. But add some grade (up or down hill), weight, traffic, etc. and the bigger truck with better brakes (and better trailer brakes) pays off.