Then when it is time, bring as little as you can to the toilet, but make sure to bring enough baby wipes for bigger accidents. (easybabylife.com)
That means you don't have to worry about replacing the mattress after the first big accident. (earlymomentsmatter.org)
Children tend to have bigger accidents at night because their bladder fills completely while they are relaxed and horizontal. (natural-parenting-advice.com)