Ringo's Caravan Rules
It's a two-player game, and the winner takes the whole pot. You build a "caravan" using the cards in your deck.”— Ringo
This is probably one of the first free quests the player will activate, since it's in Goodsprings, where the game starts.
Now start building up your deck and find other players for some leisure time!
This is probably the simplest of all quests you will encounter. You talk to him, let him speak, receive a deck of cards so that you are easily able to play Caravan and receive a note that explains all of the rules to play. Then you are ready to explore the Wasteland, play a couple hands of Caravan, and kick back and relax.
As of the most recent update, this is no longer the only way to be able to play Caravan. Buying or acquiring 30 cards is now registered by the game as having a deck that qualifies the Courier to play the game.