4000 watt Generator with A/C vs 1500 watt Gen without A/C???

I have been camp hosting in Yellowstone for four years and they are starting to crack down on noisy generators. This last summer we were issued sound measuring equipment to check noise levels. BTW the regs are: 60 DbA, slow at 50'. Most open frame generators don't meet this requirement. If the unit didn't meet the requirement we had to inform the camper that they couldn't use it in the park.

So, consider the noise level of the genset you plan to purchase if you want to use it an any national park.