Once upon a time, before
inverter generators, Honda made the quietest generators by far. RVers would be very critical of anyone firing up a non-Honda
generator due to the
noise. These days the
inverter generators tend to be quieter but there can be substantial differences. I recommend comparing the sound level specs before making a decision. Fortunately most if not all manufacturers publish this spec. And keep in mind that a sound level difference of 3dB is actually a doubling or halving of the sound energy, so small numerical differences matter. (Our perception of sound is logarithmic so we state sound in decibels, and each dB is a small but noticeable change. 1dB is a barely noticeable but you will certainly be aware of an extra 3dB.)
While one can buy a very decent generator from Harbor Freight, at a low
price (shop the sales) there are a number of brand name generators that are priced in the middle between the Honda and HF models. I would probably opt for one of them if the sound is low enough.
There is always a tradeoff: buy expensive quality
gear that will last forever on land but might not survive on the
water all that long, or get something cheaper with a throw-away mentality. Your choice.
Greg