I occasionally see videos of outdoor DJ sets is places that look like they are far from any standard power source. There are many on YouTube but here is an example:.
How are these normally powered assuming there isn't any place onsite to plug power into? Is it normally just a noisy gas generator that is placed far off camera, a portable battery, or is there a different way to do it? Many of the DJs just have headphones on and there is no audience and so it looks like they wouldn't need a lot of wattage for amplification.