A person who controls or rides a camel.
Sam strode steadily across the hard-packed sand, leading his camel. He was proud to be both a pedestrian and a cameleer.
[What was known as ODO in these posts https://en.oxforddictionaries.com/ now redirects to https://www.lexico.com/en with a new color scheme, but sourced from Oxford, apparently. I have hopes the quality of definitions will remain the same or improve. Stay tuned.]