Haven't got much done trainwise with the springtime weather here, various trips to neighboring states to visit family and the baseball season starting. But my dad sent me three photo albums with pictures of layouts, models, trains shows and prototype photos covering 1978 to 2008.
First HO layout circa 1978. IIRC, it was just two loops on separate levels.

I had some lionel that I ran on the basement floor, but this would have been the first actual layout.
Next came the "Day and Night" HO show layout around 1980. One side was a city scene which was enclosed and various lights and an operating conveyor belt.

The other side was just an open country scene.

If you look in the lower right, there's a portable HOn2-1/2 layout as well.
The Day and Night layout got converted to N scale at some point but I don't know of any pictures.
More to come including Z scale circa 1984 and a G scale layout that used to take 6-8 hours to set up

(thank godness for small town mall security letting it happen).
Jason