By CD you mean Crohn's disease? You might control bloating by reducing simple sugars (fructose in fruits, lactose in milk, but any sugar in general) and reducing dietary fiber (fruits, vegetables,...
Have you got a diagnosis? You've mentioned "gurgling/rumbling feelings" - to me this speaks for a bowel problem, possibly trapped gas in the colon, especially in the transverse colon, which runs...
They are probably fructose, HFCS, table sugar, sugar alcohols or polyols (sorbitol, maltitol, xylitol, mannitol...) that are problematic in IBS. These sugars can be fermented by colonic bacteria...
Occasional smelly gas may be from foods containing sulfur, like: poultry, meat, eggs, dairy, nuts, coconut, legumes, tea, coffee and certain vegetables, such as tomatoes, cabbage, asparagus,...