well currently I'm also very close to surgery... have 2 strictures and 1 possible fistula ... but still feeling rather good and thus will not go under the knife yet.... now I'm looking into hyperbaric chamber treatments (I am also on Imuran, but so far no effects) ...
Since I've read some science articles regarding surgery and Crohn's I have to say I plan on avoiding it as looooong as I can because once you go down that road it never ends (resection: 30 % chance for another one in first 5 years)
so... althought I can't offer any medical advice I advise you to try and hold as long as you can and try different things (maybe SCD? or hyperbaric chamber like me? )
good luck ;)