Generator question

We got a champion 3500w generator for under $500. Now I know this isn't ideal and it is pretty loud but it fits our needs. It will run the a/c, microwave, and charge the batteries. It was the low cost way to go and we don't need it very often. In the rare occasion that we do want to run the a/c and escape the mid day heat you really can't hear it inside the trailer with the air running. We just upgraded to a 2 6v system and I am very impressed so far. I will add that we almost exclusively boondock and we always try to be by ourselves if possible. So if we do need to run the geni it only bugs us. It is not usually hot enough to need the a/c (we tend to seek high altitude in the summer), and we really do not use the microwave. I would not want to run the thing often in a campsite. We recently had an experience where someone pulled up near us in a disperssed site on a weekday after we were there (we expected to be all alone), and they ran a very loud generator for 21 hours straight. That was VERY annoying.