ok this happened to me, last year. I had a spun prop, and found out as i powered out of keyport Harbour, i was able to turn around and slowly make my way to a empty slip, right next to a few guys on a boat.
I asked a man on the dock with a dog if i could pull into the slip next to his. He said the slip belongs to his friend and said i'm sure it would be ok with his friend seeing as the guy just went out fishing for the day.
I backed in, and my drive goes way up, i tied up with my ropes and changed out the prop, in maybe 5 minutes and was away.
See i asked; and used nothing and touched nothing on the dock, used my tools and had the spare under a seat in my boat.
So very helpful was the people on the dock asking my 13 year old son if he wanted a soda or anything and he was playing with the guys dog.
I have to pass these slips as i launch and retrieve from a ramp past the slips.
I wave at this guy every time i see him. And have given some info to him where i find fish if i see him on the way in and he's on the way out.
I asked first. And truly it was 5 minutes tops, from pulling in and pulling out.
I too find people are as you treat them, give respect, ask before you do and they are helpful.
Behave as a a-hole, expect to be treated as a a-hole.