I think most folk are like us when we had our own boat. When we were at Broadsedge an hour away , we always emptied boats that had filled with water, saw to canopies that had come adrift and generally kept an eye for any problems. We would have appreciated anyone doing the same for us. As you say when you move nearer which we did 10 mins away it was easier to just pop down to the boat and check.
It must be a concern at times when your boat is such a long way from home, but I am sure that most people are good people and will always help.