I did a little looking online last night and the Honda Gen sets I was talking about are rented here in Canada by both of the major movie equipment suppliers under their quiet generator heading.
They were first designed to be used at campsites and in motor homes so they should be quiet. Looking at some reviews of them in caravan / camping websites the sound is described by people as a low hum.
Before you rent it, do you have the time to go to the rental company and see if they will start one for you. That will let you hear it before you put your money down.
