I suspect docs will tell you there is no reason why you can't carry a healthy fetus to term-that's wht my GI & high risk OBGYN told me as someone with an 11-year j pouch surgery with subsequent complications person, anyway (of course you will want to have these convos with your own docs about your own specifics).
Of course, no one could "guarantee" I woudln't have complications, (reduced continence, pouchitis, be uncomfortable, develop hemmeroids, etc.)
My husband I were both very interested in adoption for various reasons, and that is the route we chose for making a family. We never attempted pregnancy, as it just wasn't something we felt called to (we felt called to adoption and I was nervous about possible pregnancy complications, so was an easy choice for us).
Depending on your state, surrogacy can be easier/harder, and costs of surrogacy or adoption, while maybe not much different than the out of pocket cost of pregnancy/delivery are obviously not covered under your health insurance, so that may be a consideration as well. And of course, if you do go the surrogacy route there are traditional surrogates and also just gestational carriers (with whom you can use a donor egg or your own-this would obviously not mitigate the small genetic propensity of IBD to your offspring).
Many with pouches have gone on to have healthy babies delivered both vaginally and c-section (although there does seem to be a higher rate of difficulty to conceive due to scar tissue) and others have used adoption or surrogates to create their families. This is a personal decision-there is likely no right or wrong answer.
Best of luck, whatever you decide! My children are my biggest blessings!