If anything, you may transition better than your fixed wing yoke bretheren.
Agree. The attentiveness to pedal inputs required in a helicopter will be useful in a tail dragger. For 2-5 seconds on takeoff and landing your rudder pedal skills in a tail dragger will be critical. Many FW pilots who fly tri gear airplanes are lazy on the rudder pedals and this gets them into trouble in a tail dragger. Once you are definitely on or off the ground, the tail dragger is like any other airplane. PC-6 looks like great fun!
Terminology (as far as I can determine):
"control stick" or "stick" - airplane control similar to cyclic in that it moves longitudinally and laterally to provide pitch and roll control
""yoke" - a more or less "U" shaped grip usually attached to a shaft (in lighter airplanes) which protrudes through the instrument panel and which is pushed or pulled to provide pitch control, and which turns clockwise or counter clockwise to provide roll control, or may also be attached to a ...
"control column" (in larger airplanes) which extends from the floor and moves longitudinally only to provide pitch control; the attached yoke turns clockwise and counter clockwise to provide roll control.
Not sure that there are precise definitions of these terms, but above is my best understanding.