Against camille, Try and stand in the middle of the lane at all times. This will make it harder for her to land her E in a trade. Don’t get close to the walls as this will give her the opening to engage. 
 
If you’re playing as a ranged champion, try and harass Camille with basic attacks whenever she tries to last hit. Camille lacks sustain in the early game, so you can poke her out of lane easily if you keep auto-attacking.
 
If Camille uses her E in lane, she will be vulnerable while it’s on cooldown as it’s her main way of disengaging from ganks. Bait out her E prior to your Jungler arriving in your lane to reduce her chances of survival. Against camille, Try to stand in the middle of the way at all times. This will make it harder for her to land her E in a trade. Do not approach the walls because it will give her the opening to engage. If you play like a varied champion, try to harass Camille with basic attacks every time she tries to hit last. Camille lacks support in the game early, so you can get her out of the way easily if you continue the automatic attack. If Camille uses her E in the way, she will be vulnerable while he is about to cool.