My friend tells me you are looking for passage to Alderaan?
Chewbacca, Obi Wan Kenobi, Yoda, and Bail Organa...Witnessess to Order 66 and the Leaders of the emerging Rebellion against the Empire.
Now this is a stretch but, I have been thinking about it lately...
Now into exile I must go... Have good relations with the wookies we have...
The FORCE uses us, binds us...flows through us..
Now hear me out in A New Hope. Obi Wan Kenobi, Chewbacca, and R2 are on a mission to destroy the Death Star with the assistance of Bail on Alderaan. Bail is sending Leia to recruit Kenobi for the mission of destroying the Death Star (that ultimately Luke carries out as a Rebel XWing Pilot).
Han, Luke, and 3PO are along for the ride or are they? Have Yoda, Ben, Chewy, and Bail planned a "chance" meeting with the twins and r2 until the plans go astray? Chewbacca is the link between Yoda and Ben and ultimately, Luke.
I feel the FORCE has brought together the Twins, through their protectors to prolong the survival of the Jedi and plant the seed of future generations of Jedi and Rebellion. Chance meeting.. hardly. Ben, Chewy, and R2 are on a mission to destroy the Death Star and to Galvanize the Rebellion and the Jedi with her future leaders.
"In my experience, there is no such thing as luck", Ben Kenobi.

(Leia's emergence to Heroine isn't as heralded as Luke's.
Leia followed in Bail's political footsteps, becoming the youngest member of the Imperial Senate. Leia also decided to support the Alliance, using her diplomatic immunity to smuggle supplies and information to Rebels. Together, the Organas uncovered crucial technical information about the Empire's greatest weapon, the Death Star.

Bail sent Leia on a mission to locate Obi-Wan Kenobi and recruit him into the Alliance to help face the Death Star challenge. Leia failed, and her mission was eventually picked up by Luke Skywalker. Bail Organa was killed when the Death Star destroyed Alderaan. )

What do you guys think? Force? Luck? or planned event between Yoda, Ben, and Bail Organa?
Thanks,
CE