O.K. this is the best I can do for the evening.
http://davesgarden.com/guides/articles/view/3473/
Skip down to paragraph 7 or so. Over the propaganda.
I can remember back in the day sending a contribution, receiving seeds and planting them on the side of the highway.
I despise LBJ as well.
What research I have done finds the issue very convoluted as billboards were heavily involved and most of it is very pro-Ladybird but it appears that federal funds were and are involved.
Thanks for the heads up.