There's a lot of work to be done yet.

No one's given River anything specific to do, though -- Jack hauled the raft over with a gold-toothed grin and a wink, gave her a hand down off the railing with exaggerated swaying courtliness, and then scurried off in alarm when someone called out a question about the barrel of rum in his cabin.

So she's wandering, barefoot and dreamy, pausing every now and then to inspect something.