My sons have always been pretty good at not wetting the bed, but they are much more likely to do so when they are tired. When we're visiting family out of town, on vacation, or have had a really busy day, I put "Good Nites" on them. We call it "paper underwear". They're in the diaper aisle of the store and go up to sizes for 7 or 8 year olds. It won't hold against a major accident, but at least you all have a better chance of getting sleep instead of changing sheets and pyjamas!