Gang of thieves - Tommy Bell, Bushranger Boy #5
Book 5 in the Tommy Bell, Bushranger Boy series
School camp can be fun, but not when it's run by a nasty bully who picks on Tommy Bell and his friends. But when Tommy's magic cabbage tree hat takes him back in time to meet up with Ben Hall and his gang, Tommy discovers that even in the gold rush days there were bullies... and they were on both sides of the law! They also really knew how to make trouble...