Sounds like fun tater!
I guess you can tell I am a strange mixture of a person who appreciates realism but is always ready to play with the gaming aspects once in awhile.
I don't have any problems leaving my career, loading up a scenario and my subnuclear cuties (I know, not released yet. I've been lazy). Then I play with how close a 30 knot cutie has to come to the target before it will turn to follow. Really you have to come pretty close or it blasts on by.
But that idea sounds like a lot of fun. Are you just going zero gyro and aiming with the arrow on the marker?