The following link takes you to a descript
ion, with pictures, of the traditional medications...for where your Crohn's is located, the 5-ASA med you woud use is Pentasa. Also shows a pyramid identifying the progression from the least to the most aggressive meds.
http://www.hopkins-gi.org/GDL_Disease.aspx?CurrentUDV=31&GDL_Cat_id=AF793A59-B736-42CB-9E1F-E79D2B9FC358&GDL_Disease_id=291F2209-F8A9-4011-8094-11EC9BF3100E
Dietary interventions that can be tried are the SCD diet www.breakingtheviciouscycle.info and the Maker's Diet http://www.makers-diet.net/
Nontraditional medications include LDN (low dose naltrexone) http://en.wikipedia.org/wiki/Low_dose_naltrexone and anti-MAP therapy http://www.crohns.org/treatment/index.htm
Because you have a stricture, you do need to start treatment right away, maybe with Pentasa. Especially if you have no symptoms, you will need to check your sed rate and CRP (markers of inflammation) in your blood after you have introduced the med, to make sure it is working. With the right medication, there's every chance the stricture will disappear when the inflammation is gone...the goal is to treat the stricture before it gets worse.
The risk is that it could built up scar tissue, which never goes away...if there's too much scar tissue, the only way to remove it is through surgery. You might already have some scar tissue...so you would want to avoid building more.
My daughter, when she had a stricture, felt fine with nearly no symptoms until she suddenly landed in the hospital. The problem with a stricture is that as soon as there is a flare, it can cause partial or complete blockage: very painful and might require a trip to the emergency room for IV hydration. Also, there's a risk of perforation during blockage.
My daughter's stricture disappeared with meds and diet.