Wizards and druid/bard faction
 

Any good race wizards go the route of killing millers/bards?

I slew some bards as a Human Wizard (Neutral, not quite good). I haven't really had many issues from it, if that's what you're getting at. Just invis up before wandering around a town you aren't familiar with (I accidentaily bumped into the one in Felwithe a couple times). Overall, it's only a minor annoyance since invis is so easy to throw on - if you enjoy the camp, go for it.

For reference, i'm also max KoS with qeynos, kelethin, felwithe & rivervale at this point and still have no issues getting around/invis banking if necessary.