MADAM MAYOR Former Camarillo Councilmember Charlotte Craven helps her 12-year-old grandson, Trevor, study for a spelling bee at her home on Dec. 22. MICHAEL COONS/Acorn Newspapers One of the longest-serving council members in Camarillo history, Charlotte Craven has left an indelible imprint on the city, say her colleagues on the dais. Despite her tenure of service,