How to see behind me?
Your state has a mirrow regulation. I see too many folks pulling a rv trailer without towing mirrors. I know following them I can see down the side of their trailer and I see maybe the edge of their mirror and never see a face.
INDIANA
A motor vehicle that is constructed or loaded in a manner that obstructs the Driver’s rear view must be equipped with a mirror located in place where it is able to reflect the Driver’s view of the highway for a distance of at least 200 feet.
Check out your state requirements per AAA
http://drivinglaws.aaa.com/tag/trailer-mirrors/ Or better yet drop by your area state tropp hdqtrs. If the shift captain/dispatcher are as friendly as mine and don't know the answers (any question) they will a size and weights officer on duty who will know.
As required by law get some proper tow mirrors before another trip. With my Dodge truck tow mirrors or my chevy dually tow mirrors I can see any vehicle behind me when pulling my 5th wheel rv trailer.