Palo Alto City Council candidates are debating how to address 150 RV dwellers living on city streets. Councilman Ed Lauing suggests posting signs at city entrances to ban RVs without a parking permit, citing a Sebastopol lawsuit where a federal judge upheld the city's restrictions. Planning Commissioner Bryna Chang proposes prohibiting RV parking from 2 to 5 a.m., while Parks Commissioner Yudy Deng calls for consistent enforcement of existing rules. Mayor Vicki Veenker says the city is making progress but a citywide ban is premature.