I too have a Camno Troll and I have developed a system for backing out of my slip that works very well for me.
I tie up my boat with spring lines running fore and aft from the midship cleat. I have a bow line, and a stern line running from a cleat located just below the cockpit door.
When I am preparing to depart, I attach a "Stretch n' Slide" bungee dock line (Greenfield Products) to my midship cleat and a dock cleat that is conveniently located just below. That bungee dock line is looped through the dock cleat so that the line will remain on the dock when I cast off. Then, I loop a "Dock Budddy" bungee dock line (also from Greenfield Products) through my stern cleat on the gunnel and stretch the other loop over the aft-most horn on the dock cleat closest to the end of the dock finger.
When I have the bungee lines secured, I can remove all my dock lines and the boat will stay in place next to the finger. I then move to the inside helm. If necessary, I apply a little bow thruster to keep the boat parallel to the finger. When everything us lined up, I reach through the window next to the inside helm and wrestle the "Stretch n' Slide" off the midship cleat. I apply reverse, and the "Dock Buddy" attached to the aft cleat will keep the stern lined up until the loop simply falls off the horn. I will then use reverse, neutral and bow thruster to gently back out in a controlled manner. The "Dock Buddy" remains attached to the stern cleat and can simply be flipped into the cockpit when fenders are retrieved.
I should also mention that I keep both spring lines attached to the midship cleat. One is secured against the aft cleat and the other is looped onto a Schaefer Handi-Hanger in the cockpit. When I return to my slip, I free the looped line and step off onto the dock where I can control the boat using that midship line. The other spring line, which is also attached to the midship cleat and secured against the aft cleat, provides a useful way to manhandle the aft end of the boat. Once I have my midship spring line temporarily tied to the dock cleat just below, I can walk aft (grabbing on to the other "fixed" spring line running along the gunnel, and then use the "Dock Buddy" to temporarily secure the aft end to the dock. When that's in place, I'll secure the "Stretch n' Slide" to the midship cleat and I am now able to tie up properly at my liesure.
I'm certainly no expert, but this has worked well for me. Remember to run your fender lines under the sping lines secured along the gunnel when you are returning so that they do not foul your dock lines!