if you really have to have a generator buy a good quiet one. please don't bring those giant loud, smelly monstrosities called a generator to the track. or at least put it far away. no one can hear the speakers and they smell awful. and they can ruin your electronics(voltage spikes). definitely need to use a surge protector with a generator!

if you really really want a generator buy a honda or a yamaha. very small and very very quiet.
they're a bit pricey but the rest of us will thank you deeply for not listening to and smelling a lawn mower engine all day.

https://www.youtube.com/watch?v=L37bGQTFpxA