[EarthBound]

Mrs. Sagan said you'll be going 1/10 the speed of light. Your retrorockets will serve as a warning flare to those in the vicinity of your proposed landing area.

That would depend on when you start firing your retros, and how low you fire them, and if you have enough fuel. General question: couldn't they pull in the sail, or simply rotate the craft (sail and all) 180%, and allow the stellar wind from the destination system to do most of the decelleration as they enter the heliosphere?

[RightWhale]

It might be mentioned that space travel might not be your forte.