Burning Man, infamous for its drug-fueled debauchery in the wind- whipped Nevada desert, may seem like the last place to haul the kids for a family vacation. But the annual experiment in radical self-expression, communal living and massive interactive art is becoming something of a counterculture Disneyland as increasing numbers of Burners from the Bay Area and beyond are bringing their young ones to Black Rock City. To the uninitiated, a dry lakebed in the middle of nowhere -- plagued by dust storms and extreme temperatures and inhabited by no small number of naked people -- sounds like no place...