Unfortunately I dont have the answers your looking for.

But If I may add my .02 .

My experience with gas generators is limited and has been years since i used them. but with the gas prices where they are at do you really think your going to save anything by using it? not to mention they are noisey. you say you looking to avoid the cops well the noise that it generates could not only annoy you but your neighbors. and when they get annoyed they call...

I do wish i had a solution for you.