Dave O,
I don't expect most aircraft will need any rudder inputs for turns in cruise, when the autopilot would be engaged. Many modern designs have very little adverse yaw when in cruise. Experimentals will vary, of course. One method to see if your aircraft is prone:
In cruise, pick a spot on the horizon and fairly rapidly roll the airplane 20-30 degrees left and right, back and forth. Observe what the nose does during this maneuver. Does the airplane stay largely pointed at the same place on the horizon?
Doing the same exercise at approach speeds often yields a different answer, with a bit of pedal required to keep the nose aimed at the same place on the horizon...
Russ