Well, if it were me, I wouldn't light my drives for the deceleration burn until I was pretty much about to enter the system, then I would decelerate as hard as I could to minimize the amount of time my drives are shining. If I was really clever, I'd be coming into the system with a bright light (i.e., the Capella supernova) shining right behind me so drive-light would be missed in the glare of a much brighter light. A garden variety star would probably work too. Unless someone is looking very closely, it is unlikely they'll notice the spectrum of the light is very wrong.