A: A resounding ... YES! YES!! YES!!!
Q: Will the celebrity in question (or any of them ... while we are at it) answer ME back?
A: Probably not .. but not because they are insensitive ... celebrities are just very busy people ... and they love reading the letters and cards we fans send ... and most likely ... if the truth be known ... they could never ... never ... NEVER get enough of it! But TIME (if there were no other reason) prevents them from being able to respond. And you must remember ... fan love is unconditional, and unconditional fan love simply means that: love with no strings attached. So write!
Q: So I write ... should I send stuff? ... and if so, what kind of stuff?
A: Yes ... my all means send stuff ... stuff like ... articles from your LOCAL newspaper about aforementioned celebrity ... anything you have made yourself (expensive -- store bought -- gifts -- are usually a turn off -- strange but true) ... hand made cards ... store bought cards (with nice personal messages) ... photos of yourself (believe it or not ... most celebrities like to see what you look like so they can have a picture of you in their head as they read your letter) ... articles from magazines about their FAVoritE things (just make sure you only photocopy the article if the magazine isn't yours!) ... poems and filk you have written for them ... or poems or filk you haven't written for them, but those which express exactly how you feel (just remember to give proper credit) ...
And I wish you all the best luck with it. But remember, eventhough Mr Baker is in his seventies now, he is still quite active. So don't expect a reply. But I know from personal experience, his fan mail means the very world to him.