I usually run the water when I go to the bathroom on my first trip because sometimes the gas sounds are loud. I think it has to do with the suppositories I use before bed becuase there is noise and then some of it comes out. Usually I have a BM 20 minutes later and after that, no gas, & no more BMs until the next morning.
When I was flaring badly I would have to get up in the night to use the toilet. Sometimes repeatedly. It was awful!