BTW... if you are overnighting, you'll wear out the welcome for everyone if you start something like this up in a WalMart parking lot or a rest stop after hours. If you are going to "overnight" make sure you don't disturb others or the normal resting hours... 10 PM to 6AM of others.
Pulling out a generator is "camping" and Businesses frown upon that occurring in their parking lots. Parking lots are not campsites or RV parks.
Not really sure what your definition is of "overnighting" or where you plan to do it, but if you're firing up a gennie, it might be OK at a truck stop, not much anywhere else, cause they run their refers and other stuff all night long, it's flat out noisy, all the time, it's a given. It's where it's not noisy all the time that it's questionable.
Overnighting Etiquette