First, congratulations on the Scamp
addition coming up!
Since we tow with an Odyssey I can probably give an answer on this issue. We tow a late model Burro
which is 7'6" wide, i.e. 10 inches wider than a 13' Scamp
. I have one of those clamp-on-with-rubber bands mirrors (from Camping World, if I remember right). Originally I had them for both right and left hand sides but took the right side off.
My experience is that they vibrate too much, are too sensitive and awkward to position, and too small to be of any real practical value. The Ody mirrors are what I use, and the extension mirror is there for show (for the Highway Troopers). Works pretty well with the originals, but there is a widening cone of a blind spot behind the trailer which is a problem. I suspect that on the narrower 13' Scamp you will find the Ody mirrors work very well and instead of an ever-widening "cone" of blindness behind you it will be more like a "rectangle" which will be not much of a problem. Seeing through the trailer is not something I would rely on to be practical.
Therefore, the extension mirror is just to fulfill legal requirements, and I don't even know if one or two are actually required. We have never been stopped for inadequate mirrors. You may have to find out whether extension mirrors are legally required in your state for towing a 13' Scamp (6'8" width).
This is an issue with me, and I don't like the blind area behind my trailer. I don't know what's behind me and I don't know if someone is racing up behind me to suddenly swing out to pass, etc. etc.
After 6 years + I have decided to go the high tech route and I have installed a rearview camera on the tail end of the Burro
with an 5" LCD screen on the dash. By playing chicken with the rain I have managed to test the camera/monitor, make and install very solid mounting brackets for both the monitor and the camera and the plan is to hook it all up soon. I will report on this forum what my conclusions are.
So, unless the police are anal about the mirrors I think you will have absolutely no problems getting it home as long as you compensate for the blind spot behind the trailer.