I've been having more activity at night lately too, and man am I a bear because of it! I also notice that sleeping on one side makes me feel like I have to go more, but for me it's when I'm on my left side. I try to not eat anything after 9pm, but that doesn't always make a difference. Sometimes I stretch and/or meditate before bed and I do tend to sleep more soundly when I do so, but it's not a guarantee. People w/out bowel issues keep telling me to take sleeping pills and I'm like "yeah, I'm afraid if I sleep through what my body wants to do, it's gonna do it anyway..."
Like Scott said, if you search around the site you'll find lots of suggestions. I think it's really promising you're doing well during the day, fingers crossed your nights quiet down soon!