Hmmmm, I don't know if I'd consider myself in remission if I had urgency like that. It does sound like you are almost there. Perhaps it is partial anxiety? Also, with the Rowasa, do you always insert them fully or do you sometimes pull them part of the way out to hit the rectum more? (Quincy suggested this and I've found it does help)
When I had urgency it was pretty bad but I had a minute or 2, mine was not necessarily related to eating so there was no pattern of when I should expect it.
Now that I'm in remission I still go every morning but it's usually a slow build up...some mornings it's a little faster but never urgent to where I don't know it's coming and can't make it.
Oh, and here's one thing my GI said 'you may never feel EXACTLY like you did before UC but you should be blood/mucus free and have control. You should strive to be as 'normal' as possible but you may always have more stomach noise, etc. As long as there is no evidence of constant inflammation and you have your life back, that is what we are going for.' So, in his opinion, having control is something you want to have to be considered in remission. Just his/my opinion.
Hope you feel better soon!