Hi, I have Crohns and had an ileo done 20 years ago and yes I have had several flares since then. I went onto azathioprine in 1995 and this has helped to dampen down the flares and only stopped it nearly 2 years ago on advice of GI as had been 6 years in remission. Unfortunately, my CD woudn't stay in remission without medication so after very nasty flare last autumn am currently back on azathioprine which I will continue for life and also Humira which will only be for up to 12 months.
With CD having an ileo isn't a cure, it can come back in the small bowel. I would suggest you see how you go with the steroids and if they get it under control great if not then have a chat to your GI about starting a permanent drug regime. CD can continue to develop slowly with no initial symptoms on a micro level then hit you suddenly with a bad flare so taking a drug continually isn't a bad idea to keep it all under control rather than trying to get it back into remission after flare has occured.