How does Miles compare himself physically to Chip in "one hundred twenty-eight days before"? Where does Chip take Miles after they meet?

Miles comments in narration on how physically different he and Chip are (Chip is short and muscular, Miles is tall and skinny) and on how commanding Chip is. After Chip essentially orders Miles to follow him in search of cigarettes, they visit the dorm room of the chatty, outspoken Alaska.