How can i get a good amount of sleep on tour with other guys?

I am in a band as the bists, keyboardist, and backing vocalist. Our band has a lead singer/rythmn guitarist, lead guitarist, and drummer. And we are also touring with our neighbors band(which has 5 people) we are all high schoolers if that helps. And alot of times i can't get enough sleep because when i want to sleep others are up. The reason i have trouble is because i am a light sleeper(like really light). While our drummer can just crash and ignore a freaking bomb exploding without waking up. I need some ways to help me be a more heavy sleeper. I AM NOT TAKING ANY NARCOTICS OR DRUGS, NOT ONLY DOES THAT MAKE ME PERSONALLY SLEEPY WHEN WE ARE PERFORMING BUT ALSO I DONT WANT TO BE DEPENDENT ON IT