Glad you found the lyrics. You may be interested to know that the writer was singer / yodeller Les Wilson who came from New Zealand but eventually settled in Australia. He recorded in the 78s era but had a few LPs released. He was a fine yodeller in the Wilf Carter style and was famous for recording in an old building with echoy accoustics. On the yodel part he would turn away from the microphone and yodel to the far wall, creating a rudimentary echo sound.

Rockin'over River became a NZ country standard and was recorded by Eddie Low, Max McCauley, Owen Blundell, Wayne Horsburgh and others. Some US artistes siezed upon the song - if I recall, Jill jones did a fine versioon with hays Country gals & Pals.

Les's brother Cole Wilson was also a fine yodeller and made several albums, EPs and singles. Although also a big name in NZ he never recorded with Les but instead recorded with his own band, The Tumbleweeds.

I too would be interested in that yodel documentary. In return I could let you have a copy of one I did with the BBC a couple of years ago. I have also compiled several yodel albums for different labels. Feel free to email on paul@pithon.co.uk