My thoughts as well.

238 g of Miralax mixed into 2 L of flavored sports drink. Drink all of it over the course of 24 hours at least 24 hours before the event.

Then immodium 2 mg twice daily to maintain a poop free existence.

Warning: this WILL work but also runs the risk of damaging your GI tract of maintained for too long.

Same here but because of Sync.