I'm visiting a naturopath currently, also using alternative treatment that he suggests. Is my saviour at the moment actually, no idea what I would do without that kind of treatments. The medication based section is anthroposophic / (homeopathy), the other section is eurythmie, autogenic training, meditation, special type of massage; also working with a very good dietician and products she recommends (sour milk product, kefir, certain probiotics; slightly see some effects even from the probiotics, had some side effects quite quickly and now seeing first results).
I feel a lot better emotionally, because he and my nutritionist really care and want me to feel better (well, my gastro as well I think, but she always is in a hurry and my GP only cares when something with my blood work is wrong, otherwise he doesn't really have an idea what to suggest, apart from taking a break from life kind of, going on holiday or something like that..., weird). They keep believing in symptoms getting better and me feeling better again though and they let me know that they won't stop searching and trying until I feel better.
Whenever I need to I can consult them both, also on the weekend, this gives me a very safe and supporting feeling.
For me, key is working with specialists who listen and work out an individual treatment plan for me, altering the plan when it is needed and keep believing that things will get better.
That's something my gastroenterologist isn't able to because she is too busy and has too many patients, too much reputation, too little time, no time to schedule out a very individual treatment plan.
I would recommend first thinking about what kind of treatment you would be interested in because there are tons of different treatments and nearly every person offering some kind of treatment will tell you it works but many might not work for Crohn's. My naturopath always tells me that it's an additional kind of treatment for me which enables my medication to work effectively, no more, no less. Maybe one day going off a drug might be an option, but actually this is not something I would ever think of, I would be so thankful to just be in remission one day, no need to get off the drugs if I don't have to.
Hope you can decide for a therapist that offers that kind of treatment that might be most beneficial for your kid. For me sympathy and feeling safe and comfortable is a big issue as well for really feeling that support and benefiting from it.