First, as a philatelist, what you do in the privacy of your world is your business, but I don't want to know about it.
Second, and more seriously, Black Rock Post Office can send letters out to civilization with a U.S. postage stamp on it, and it will have a Burning Man cancellation on it. Letters or post cards can be sent. There is really no delivery into the event, but letters can be sent to other campers if a camp address is provided.
If you can get a letter in the hands of someone attending, it can be sent to you. (as I type this, I can do it for you without any big issue) I never met your dad, but knew of him. I never camped with him, but he would have had to have been there more than 10 years ago.
Is the address to send it on your post correct?
edit, post card addressed and ready to go!!
