Without confessing to past Sins....If one occupies the Left Hand Seat both the Thrust Lever (Collective for Single Rotor Helicopter Pilots) and the Power Steering Control Wheel can be operated with ease.
Unless you have some rare anatomical abnormalities one would have to rely upon the Force Trim system to monitor the Flight Controls.....that being having two complete sets of Arms in order to have your hands on the controls and the power steering knob all the time.
An Aft Gear Swivel Lock must be released and the Power Steering actuator on one of the two aft landing gear actually swivels that gear leg and the opposite gear is free to caster following the powered gear leg.
Taxiing on all fours requires setting the Cyclic in a neutral position and leaving it alone while using one's feet for braking and the left hand for applying a minor bit of power by means of the Thrust Lever.
Pedals are kept centered while using the Power Steering.
Visibility is very limited when looking cross cockpit and with scant rearwards view past the 90 Degree angle.
There are certain emergencies that would prove difficult to manage were one to be alone in the aircraft.
My knowledge of the Chinook ended with the C Model but in all of the A,B,and C's Force Trim was on all the time requiring the use of the Cyclic Force Trim Release Button and the Thrust Lever had a similar friction brake system with its own release trigger on each Thrust Lever and was on all of the time unless triggered by a Pilot.