Camper AC does not work at night - fan will not stay on

I wonder if as the park fills up at nite and every one returns to their trailers , could the voltage in the park drop enuff to to cause problems ? Far fetched I know but last week it happened to me . Was plugged in a back yard and every thing work fine unless the home owners A C tried to run the same time as mine was starting . The homeowner got angry when I snuck in and thru his breaker !