I do enjoy heavy chunky beers, but I rarely drink in the 24 hrs prior to a big/long ride for performance reasons, and beer doesn't affect me in "that" way anyway.
In the last 35,000 miles of riding, (according to Strava ~1,400 rides including many centuries, brevets, double centuries, and a 24 hr triple century), I can only recall having to eliminate solid waste ONE time DURING the ride, and it wasn't a BIG ride either, maybe just 30 minutes into the ride, requiring an almost nude undressing deep in the woods due to shirt removal to get the bibs off. My go-to pre-ride-prep is taking Miralax and 32oz. of water 12+ hours prior to the start of a big ride, like at 5pm, so that the system is fully flushed right before the ride starts the next morning. Performance is always a little bit better if I "drop some weight".