I tend to eat dinner by about 7pm, and then have a snack at 9:30 and then bed by 11. I empty my bag just before falling asleep, and sometimes, I'll wake up once to empty, and other times (like last night), I didn't get up till 6am to empty.
When I first came home, I would sleep on my back, and that seemed to result in the output gathering around at the top and causing a blowout. I used to set my alarm to wake me up every three hours, as well. I now sleep on my side with a pillow to have gravity do its thing and slide things downwards. I never think to set my alarm anymore, either.
I tend to eat a lot more fibre based foods during the day, and ease up on raw vegetables and other higher fibre foods at night. That way, my output isn't so thick.
I haven't had a night-time blowout in quite a few months. Not sure if that's just luck or something else, but 'touch-wood'!
Kismet