Question about training with markers

Wiki says to reward every time after you mark, even once the marker is "loaded". Even says that if you don't, Fido may become a pessimist and be slower in learning new things. What are you supposed to do when you want to reinforce something that you can't practically immediately reward in a traditional way? Say I want to reward Fido for going to a location remote to me. I thought those situations were what a marker word/sound is for.