Backing in alone takes more time for me, but I don't mind it. Its when the DW is there that it can be problematic. My rule is to only let me know if the trailer or truck is going to hit something or of the truck is going to hit the trailer. Otherwise I get too confused..go left..go right, no i meant other left..other right...lol.
What I can't stand is the cramped busier sites...I mean I'm trying to get the trailer in as quick as possible...and I got someone in a car beeping the horn at me because they can't get by? Really? Its not like i'm building the campfire first LOL.