Those are contractor grade generators, they will be
much louder than any of the inverter types, regardless of manufacturer and the power they put out is not as clean, which can be harmful to electronic devices.
You did not mention what trailer you have or what the expected load will be, so it is hard to tell how large a generator you will need.
I have a Champion, 3100 Watt inverter generator and it will start/run my 15K BTU AC unit as well as a few other things in the coach, like the converter, inside and outside fridges and TV.
If I want to run the microwave or other high draw items, I have to turn the AC off.
I have also used it, during power outages, to keep the home fridges, freezer and cable TV boxes running... did not want to miss any of my recorded shows
Welcome to the forum.
-Brian