The short answer is: It depends on the teacher. But you should clarify this with the teacher before signing up for this course. Tell the teacher what you are willing or unwilling to do. For a short summer course, I can’t imagine any teacher of any method trying to change the student’s technique, and I think it’s unconscionable for any teacher to presume that it is in the best interest of the student.
These summer harp camps are primarily a place to polish pieces, work on interpretation, play some ensemble stuff, perform, etc. They are NOT a place to make fundamental changes to a student’s technique.