About a week before the game's story started, Ringo, a trader for the Crimson Caravan, came to Goodsprings saying he'd been robbed and attacked (proof of his story can be found on I-15 east of Goodsprings is a caravan where the bodies of two Crimson Caravan guards and two brahmin can be found by a blue trailer). Trudy allowed him to stay at the abandoned gas station and lie low. The player may encounter Trudy arguing about Ringo with a powder ganger, Joe Cobb. Joe Cobb has come to Goodsprings looking for him, threatening to burn the town down if they don't turn him over. Trudy informs you that Ringo is hiding in the gas station.
If the player helps Ringo and finds him at the Crimson Caravan Company, he will give you the full payment for saving his life. When asked what he would do next, Ringo tells the player he has been assigned to lead the first major caravan to New Canaan as part of the Crimson Caravan establishing itself in the Mormon territories.
Ringo is one of the easiest people to beat at Caravan. It is easy to get 30 wins against him if you are aiming for the Caravan Master achievement/trophy, since there is no limit to the number of games you can play against him.
He will turn hostile if you have negative reputation with the NCR or if you're wearing armor of the NCR's enemies. Killing him will result in reputation loss against Goodsprings. Sneaking away from Goodsprings may help you maintain your good reputation with them.
If you talk to Joe Cobb and agree to help him before talking to Trudy and/or Ringo, Ringo will say "no thanks, I saw you being friendly with Joe Cobb" when you offer your help to him and will result in a failure of the quest Ghost Town Gunfight. All other interactions with Ringo are still available, such as asking to play caravan.