While I appreciate the idea behind this post, it is really important to keep a few things in perspective. As it is stated, everyone reacts differently.
The small bowel follow through was the primary test in diagnosing my disease. Combined with the scope, you will get a very good overall image of the condition of your son's bowels. There are a wide range of results possible here, and each needs to be treated in a different manner.
Prednisone is great initially at knocking down inflammation, but can cause water retention, weight gain, sleep problems. For me they were effective initially (felt massive improvements in about 12 hours) but I became resistant to them and started to show edema fairly quickly.
Pentasa and the family are best used for the colon and minimally effective at best normally in the small bowels. For me they were ineffective.
6MP seems to have done at least some good for me for awhile, then failed spectacularly.
Remicade and azathioprine are my current meds and are showing signs that they may need to be re-examined. However, they have worked very well for me for 8 years when nothing else ever did.
Any treatment needs to be weighed against what will (or likely will) occur without it. I have undergone 6 surgeries and damage to knees, wrists and lost almost 20 years of good living. For me, the possible dangers of my current meds are more than made up for by having essentially a normal life. I say this as someone who has had some skin cancer removed only three weeks ago. I was approaching surgery for my bowels almost every 2 years, and there was a real danger that I wouldn't make it off the table on one of the last ones.
There is a lot to consider going forward for you. A second opinion is always possible. Go into your meeting after the tests with A LOT of questions. Ask to see the images if need to be to clarify in your mind what your doctor is talking about. Ask about the extent of the disease, what are your treatment options along with the pros and cons of each. Some treatments do take months to show effect.
Best wishes for a simple case and an effective treatment plan right out of the gate.