Happy Trails Expedition

Happy Trails Expedition is the introductory quest to the Fallout: New Vegas add-on Honest Hearts.

Detailed walkthrough
After leaving Doc Mitchell's house with the add-on installed, the Courier will receive a radio signal from Jed Masterson about the "Happy Trails Caravan" heading through Zion on the way to New Canaan. The beacon for the northern passage subsequently appears on the Pip-Boy map, and the Courier can travel there and speak to Jed about joining the caravan. Jed Masterson will only allow the Courier to travel with them if they are traveling without (or are willing to dismiss) their companions and carry no more than 75 pounds.

Note: The Courier can increase the weight limit to 100 pounds by:
 * Passing various speech checks with Ricky.
 * Passing a Survival check of 50 with Jed Masterson.
 * Having the Strong Back or Pack Rat perks and using appropriate lines in dialogue with Masterson.

The Courier can speak to Ricky at length and call him out on his lies multiple times using the appropriate skill checks (Survival, Guns, Science, etc.), causing him to leave. Additionally, there is the option to keep silent about his lies if he agrees to carry some of the Courier's gear, resulting in an increased carry limit (although physically giving items to Ricky is not required). The Courier may also pass a Medicine check (45) to diagnose Ricky as a Psycho addict, convincing him to leave before his stash runs out on the trail or opening up the ability to sell him the drug and Fixer for the trip at an exorbitant price. This does not prevent the other skill checks from being carried out to convince him to carry some of the Courier's gear or leave the caravan. The player can charge him 30 caps per hit of Psycho up to a maximum of 10 hits, and 1 dose of Fixer for 80 caps.

Once any companions have been dismissed and the weight of items not exceeding the limit (any additional items can be safely placed in the crate next to Jed), talk to Jed again to travel to Zion Canyon. Completing this quest triggers the opening cutscenes for Honest Hearts, and begins the Arrival at Zion quest.