It's probably different from place to place, but in my city mobile food trucks can operate on any non-residential private property with no additional permitting

It's probably different from place to place, but in my city mobile food trucks can operate on any non-residential private property with no additional permitting requirements and can operate on public streets with a permit for up to two weeks. Presumably private property can figure out their own power infrastructure and the 2-week limit on public streets would seem too short of a time for installing power to make sense.