I was told about from a burner in the very early 90's.
Before computers burning man was (I think) mostly word of mouth and posters...artsy crowd, mostly from SF Bay area. They used to drive very interesting vehicles through to the burn...some of the best graffiti I've ever seen...I'm also from NYC, I know my graffiti and I miss seeing the painted circus drive through town like it used to...now it's a parade of non-descript vehicles....
If you live in the region of the burn, you're a "backyard burner" it probably landed in thine lap. I'm not knocking this occurance...just really good fortune.
However some backyard burners (one in particular!) are accidental backyard burners and phoney, lying, cheating, heart breaking ex's!...(can you tell moon was taken advantage of?!

Oh, sorry...was thinking outloud)...accidental backyard burners are an oxymoron, they aren't really burners... (and I'm glad it's over!..oops, there I go again)
I am blessed with the fact that many circles of circles of freinds,
both backyard and far and wide are burners...I imagine many of them discovered it through an art background....I am not an accidental backyard burner but I am a backyard burner and would probably have discovered it from a distance through art, if that makes sense...then came the computer era and well...the rest is history in the making!
Technology, science, etc etc etc brought every type of burner from every interesting background...some like it, some don't...I find it fascinating and roll with the times...

I'm the MAN in a truck, burner who is stuck, you're in luck! I'll whip out my BIG tow chain and not charge you, not even one lousy buck!