Anyone experience large amounts of gas?

Check your diet. Lactose intolerance is common among all adults, and especially those with inflammatory bowel disease. If you are deficient in lactase, the enzyme that digests milk sugars, you will fill up with gas each time you consume a dairy product (with the exception perhaps of yogurt and hard cheeses).

I've had terrible flatulence with this last flare. It's made retaining rectal meds a challenge!

Now that I am getting the inflammation under control (thanks to SFRowasa), the amount of gas I am passing has reduced dramatically.

As others have pointed out, there are other things to consider too, like lactose intolerance. If you are in remission but still passing excessive amounts of gas, you may have other issues.

I had colic when I was a baby, horrible gas when I was younger (my mom used to have to sit and rub my stomach forever to try and loosen it...it was awful!), and now as an adult, I get horrible gas regularly. It's often rancid, always embarrassing, and there really is nothing other than the UC that causes it. Now that I am treating this new flare, I find that it is reducing slowly but surely again, which for me shows that it is definitely the UC. I doubt it's something that will ever go away completely though, at least in my case. I would at least get tested for other food intolerances though, as many of the other posters suggested!