Trivia: In the final shot, the Creeper's eye looking through one of the holes of dead Darry is Justin Long's eye. (Confirmed on the DVD commentary).
Trivia: Just something to spot - when the Creeper picks up the male police officer's head to eat the tongue, the slogan on the large billboard behind him reads "tastes so darn good!"
Answer: There's no reason he couldn't use a gas station. In the dark he just looks like a guy with dark skin, unkempt hair, and a trench coat. Even if somebody does get close enough to get a good look at him, he would easily kill them to keep his secret.
BaconIsMyBFF