Probably worth listening to the most recent podcast
Like the whole thing…
Also for packing in the carbs, breakfast cereal. The farther out from your big ride or workout, the higher fiber and then taper that down the closer you get. I think @Nate_Pearson jammed a ridiculous amount of carbs down prior to Leadville with cereal.
but then again go back to the podcast as it will give you some ideas.