Another vote for self landing and self launching over asking a passer-by.
You can do it.... you are.... NoMoreBikinis!
Super-kiter.
I self launch using the anchor approach. Tie a line to tree root, and hook the chicken loop to the line, set the kite on it's side, walk back and hook in. But I'm game to do the pull on the correct back line and have the kite catch the wind. Self-landing is easier. You can land it gracefully, or do the, "fly it down to the beach at the edge of the wind window, and do a quick release of the chicken loop" and let your safety de-power do its thing.
Best would be your idea, get your instructor to give you a special lesson on self-launching and self-landing. Tell him/her, that's all you want to practuce for a half-hour or so.