I guess I would try and imagine what you would do if she did go to a b&m and graduate when she was a bit older. Personally I find some of these traditions over the top. When my daughter graduated from b&m H.S. She got a yearbook & had her friends sign it, she had a formal portrait because the school required it for your picture to be included in the yearbook but never bought any of the photos. (We kind of forgot and IMO my husband is a better photographer.) Plus the senior pictures were taken 10 months early? My daughter didn't get a class ring? She wasn't interested and when would she wear it?
She did go to the class graduation party. Her grandparents came to her graduation ceremony & we all went out to a nice dinner. She went to her senior prom, with all the trimmings. (Although her friends didn't do a limo.) We did not do graduation announcements. And my daughter got a very nice graduation gift, of the laptop she would need for college in the fall.
The thing I would miss is no formal yearbook. Perhaps you can arrange & get printed a "high school years" in retrospect keepsake book for her as a gift. A number of online photo places will print keepsake memento books. Perhaps you could even ask some of her teachers, or friends to add comments to add to it.
