First, my manual and I were approved by the USCG, plus they NEVR dock single handed and rately have single engine/ rudder boats.
I think I am in charge of docking my boat, in fact I know I am....but some dockmasters don't know that and one I argued with would not let me stay for my overnight reservation despite the guy in the Flemming in front of me who agreed the dockmasters method endangered his boat.
And usung a midship line.... I still feel it is only occasionally the best or OK line. Single handed in a single screw boat iit is almost or is impossible in some situations to get parallel to the dock close enough without linehandlers... So if that is your go to without being good at using other lines, you are screwed.
Oh, and some places the current is definitely a bigger issue than wind as it happens every day, twice a day in varying amounts and switches to reverse the difficulty sometimes.
Good points.
And, regarding the single engine, solo operation.... that's me a lot of the time. And yes, there's times that I just can't get the job done but fortunately not many. The worst is backing into a slip with a cross wind or current. I can really make that one look comical. So the answer is to put a fender board up to maneuver on the downwind, outside piling and go in bow first and secure the upwind side. Sometimes that works.