I just installed one of those venturi exhaust kits to send generator fumes up in to the air, it was really simple, and is very effective. The kit I used was from Amazon and was a great price. We would like to use the generator sometimes without sending fumes to our neighbor campers so this will do the trick. It all comes apart and can be stowed for when it is not needed.
https://amzn.to/3OHR6aA