I learned this song at Girl Scout Camp as well, only (like many people) a bit differently. This way:

There are suitors at my door
Oh a lay oh la kee-ah
Five or ten or maybe more
Oh a lay oh la kee-ah
And my father wants me wed
Oh a lay oh la kee-ah
Or at least thats what he said
Oh a lay oh la kee-ah

Oh lay oh la
Oh a lay oh la kee-ah
Oh lay oh la
Oh a lay oh la kee-ah
Oh lay oh la
Oh a lay oh la kee-ah
Oh lay oh la
Oh a lay oh la kee-ah

And I told him that I would
Oh a lay oh la kee-ah
When the rivers ran upstream
Oh a lay oh la kee-ah
Or the fish began to fly
Oh a lay oh la kee-ah
Or the day beofre I die
Oh a lay oh la kee-ah

Oh lay oh la
Oh a lay oh la kee-ah
Oh lay oh la
Oh a lay oh la kee-ah
Oh lay oh la
Oh a lay oh la kee-ah
Oh lay oh la
Oh a lay oh la kee-ah

And the rivers ran upstream
Oh a lay oh la kee-ah
And the fish began to fly
Oh a lay oh la kee-ah
And at last I found my love
Oh a lay oh la kee-ah
So tomorrow I must die
Oh a lay oh la kee-ah

Oh lay oh la
Oh a lay oh la kee-ah
Oh lay oh la
Oh a lay oh la kee-ah
Oh lay oh la
Oh a lay oh la kee-ah
Oh lay oh la
Oh a lay oh la kee-ah