Luke watches curiously as Link goes about his business. A stick? Yeah, that kinda made sense. It'd do in close combat for now. But the mushrooms? That he's not sure about.

Does he notice a few more mushrooms nearby and stop to pick them? Yes. After shoving them into his shirt for safekeeping Luke heads for the nearest cluster of people. After all -What's the worst that could happen?

Where Link goes after that, Luke doesn't really pay attention to find out because the new mission brief is pretty attention grabbing. But if they separate here, Luke'll absolutely look him up later to see if he wants the mushrooms he grabbed.