No, maybe you're not understanding what I'm saying. The OP was asking about super-charging her glycogen stores. That's literally not possible for a multi-day event. Recovery nutrition as well as on-bike nutrition will be super important for your DH, and for anyone doing an event of that nature. But he could eat an entire candy factory the night before he left and not make the slightest difference in the glycogen reserves he had on the third day. It just doesn't work that way.