The tune is "Wich-i-tai-tai" (spelling's probably a bit off) by Brewer and Shipley (of "One Toke Over the Line" fame). The album came out right after the "Tarkio Road" album, has a brown cover and I'm *^#$! if I can remember the name of it right now. (I'll post again when it swims back into my ken...)

The song alternates verses in a Native American language - I would a guess a Plains tribal language - with English:

"Water spirits, springin, springin, round my head... etc."

Great harmonies and certainly a fine tune to sing around any campfire!

Thanks for bringing it back to mind.