As camille, Keep the wave closer to your side of the map to force Camille to over-extend for farm. She is weak early on, so you can force her fall behind in CS from the get-go.

Abuse your range advantage to bully her down and get an early health lead. In particular, auto her when your empowered auto is up, and when she walks up to last hit.

Try and stand in the middle of the lane at all times so it prevents Camille from easily landing her E on you. 

Post 6, you should continue keeping the wave closer unless you’re ahead. Regardless, save your E post 6 so you can disengage/ re-engage after she tries to all-in you.
 As camille, Keep the wave closer to your side of the map to force Camille to overtake for the farm. It is weak early, so you can force her fall in CS to go. Take advantage of your reach advantage to intimidate her and get an early health advance. In particular, she is self-sufficient when your self-authorized is up, and when she climbs up to the last strike. Try and stay in the middle of the track at all times so that it prevents Camille from landing easily on you. Post 6, you should keep the wave closer unless you are in advance.