Yes, I hate coming in and having to move my harp onstage when its not a break, since its so rude (and plus I need someone to help me with it), so usually, I’ll come either at the beginning of rehearsal and spend my time offstage reading, or I’ll come during a break. It may not be more convenient though.
Its especially frustrating when they’re running behind schedule and the piece I’m playing in is tacked on for 10 minutes at the end. I’m glad I’m not the only one who has only been to rehearsals for 20 minutes though.