I just saw this thread. It's different, so I'll vote and keep reading. My votes are below:

[X] - Stick with your original plan. Go back to the Stationary Shogunate and give the package to your clan elders. 

and

[X] - Let him in on your plan.

     [X] - Ask him if he can help identify the package.

I feel like being a lone wolf here would get the samurai killed, which is why I voted the way I did.