The amount of adverse yaw depends on the type of airplane.Pattern type planes have very little,while older scale type plane can have larger amounts.For ex, a scale piper cub,or champ has quite a bit and does need a lot of rudder to coordinate the turn.I personally dont mix aileron to rudder,dont know why,just never got into the habit.As far as steering on the ground,99% of the time its going to be the rudder,connected to either the tailwheel or the nose wheel