Most athletes have the same basic fueling needs before a track meet starts.
During meets however, athletes who participate in multiple events have different needs from the single event athlete. Multiple event athletes don't always know when their next event will start or how much time they have for refueling. This is especially true of large meets with qualifying trials including State. Fluids and carbohydrates are needed but there is little down time in which to eat them. Distance runners on the other hand know when they will run and how much time they have for recovery.