Whenever I ask for help moving the boat somewhere, I try to provide food (and drinks after the anchor is down). Getting to and from the boat is their responsibility, unless I'm dead-headding a car back to the starting point.
Can't imagine charging them. Even DavidPM who keeps pointing out where I need to install cupholders and criticizing my sail trim.
I guess since he's a Captain now, I should be feeding him steak and lobster.
Same for daysails. HugoSalt brought a bottle fine liquor once though. It was fantastic.