Alida Millikin Camp, a Colby trustee since 1964 and a beloved advocate for students, died at her home in Blue Hill, Maine, on September 19. She was 89.     Famous for her generosity--Camp's financial support to Colby as well as a handful of other colleges, preparatory schools and charities totaled millions of dollars--she was a favorite among Colby student leaders who occasionally were treated to sailing trips on her boat, Thistledown.     Sailing was her passion from an early age. She once told a reporter that her earliest memory was "standing with my father at the tiller." Shannon Baker '98, former president of the Student Government Association, recalled in an Echo article that Camp carried photos of her boat in her wallet and would produce them to share the way other people show pictures of their children.      Camp's involvement with Colby began when her husband, Fredric, was named to the College's Board of Trustees in 1941. Fredric Camp died in 1963 and Alida replaced him on the board. She was named a life member of the board in 1985. In 1979 the College awarded her an honorary degree and in 1989 she received the Marriner Distinguished Service Award.     "Although she was a member of a number of trustee committees through the years, there is no doubt that she was most satisfied by her long service on the Student Affairs Committee, where each generation of student leaders came to know her well and unfailingly looked forward to trustee meetings for the chance to renew friendships with her," said President Bill Cotter in his memorial tribute to Camp.     "Her interest in the lives of these young people was matched only by the respect and affection they held for her," added Larry Pugh '56, chair of the board.     Her husband's death, from multiple sclerosis, was the impetus for her long and deep involvement in the National Multiple Sclerosis Society, an organization she helped establish. It was one of many non-profit organizations she supported for more than half a century. She was one of the bulwarks and a long-time board member at the College of the Atlantic, and she was a strong supporter of her alma maters--the Brearley School in New York, Milton Academy and Smith College--as well as Blue Hill schools. George Stevens Academy in Blue Hill dedicated its library in her honor when the building opened in 1992.     Born in 1908 in New York City to Dr. Seth M. Milliken and Alida Leese Milliken, Camp spent every summer of her life in East Blue Hill.     She is survived by five adopted children, Nicholas R. Camp of Carmel, Maine; Susan C. Schewe of Lecanto, Fla.; Donnell Camp of South Londonderry, Vt.; Catharine C. Lund of Groton, Mass.; and William M. Boardman of Woodstock, Vt.; as well as by 14 grandchildren and nine great-grandchildren. Two brothers, Minot K. Milliken of New York City and John F. Millikin of Pittsboro, N.C., also survive her.