Summarize Bilbo's plan for freeing the dwarves from the Elvenking's palace.

During a night of festivity, Bilbo saves his group by stealing the keys of the drunk jailer, unlocking the cells of the dwarves and helping them fit in a flotilla of empty wine barrels that are being floated downstream. Bilbo has some difficulties but he manages to stay afloat, clinging to the side of a barrel. In the meantime, he hopes that his friends are not drowning in their heavy casks. But at least they are out of the castle-fort and will soon drift onto the banks of Lake-Town.