A lot vs. Alot: 9 Grammatical Pitfalls
a person who is very pleased or content
When he saw the report card, he was not a happy camper.
usu. used with a negative
A contented person; someone well pleased: Quayle called the people of American Samoa ''happy campers''
[1980s+; said to have originated among California movie and show-business people; the reference is probably to child clients of summer camps]