But I think there's a difference in the sentences Julie. "Where are you going?" I agree is perfectly natural, but the answer does not require the preposition "to" so neither does the question, whereas you have to "tell something TO someone", you can't just "tell everything her".
It can change the meaning of the sentence, eg. "I have a few people to read" would mean I have collected some people I want to read a passage at assembly, whereas "I have a few people to read to" means I need to read to a few certain people.