I just read the 1959 edition of You Will Go To The Moon.
An unnamed boy representing "you" takes a trip to the moon without his parents; so I guess it's like summer camp, except he's the only child there. The authors were aiming for scientific accuracy. As you can see from the illustration, they use a 3-stage rocket. They stop off at a space station on the way, just like in 2001: A Space Odyssey.