ON FRIDAY 4 March, Campus Travel (071-730 3402) is staging the 'Rough Guide to Student Travel Fair' at International Students House, 229 Great Portland Street, London. It will include exhibitors from travel organisations, aid agencies, experts on working abroad, and student cultural societies. A programme of seminars with guest speakers includes a presentation by Oxfam on Third World trade issues, a talk by BBC travel reporter Sanka Guha and another by the Independent's Frank Barrett, on travel journalism.