I have a trolling motor on my 222CCP. It takes a 60" shaft (not a 54" - I know from experience!), and I would recommend a Minn Kota over the MotorGuide because the 60" shaft on the MotorGuide makes it soooooo heavy! The shaft on the Minn Kota is composite - much lighter and it flexes some and will not bend/break. I got a Minn Kota Riptide 65 Autopilot and have been very happy with it. I got the wireless kit so you can operate the motor from anywhere on the boat with a neat little key fob control. The Autopilot feature holds a heading regardless of wind or current and makes the motor much easier to use when you are trying to keep your mind and eyes on fish rather than on the motor.
Also, make sure you get a detachable mount so you can take the thing off easily when you don't want to have it on the boat. Also remember to use the right wiring - #4 or #6 depending on the motor - so you get the juice where it needs to be!
Good luck and good fishin'!