dancing to the music in my head

I woke up this morning with the first verse and refrain of this song stuck in my head, and those are the only words I knew, so, out of desperation, I went and looked them up. And now I have even less of a clear idea of what this song is about. Any ideas?

I pulled into Nazareth, was feelin' 'bout half past dead
I just need some place where I can lay my head
"Hey, mister, can you tell me where a man might find a bed?"
He just grinned and shook my hand, and "No" was all he said

Take a load off Fanny
Take a load for free
Take a load off Fanny
And (and) (and) you can put the load right on me

Picked up my bag, went lookin' for a place to hide
When I saw Carmen and the Devil walkin' side by side
I said, "Hey, Carmen, come on, let's go downtown"
She said, "I gotta go, but m'friend can stick around"

Take a load off Fanny
Take a load for free
Take a load off Fanny
And (and) (and) you can put the load right on me

Go down, Miss Moses, there's nothin' you can say
It's just old Luke, and Luke's waitin' on the Judgement Day
"Well Luke, my friend, what about young Anna Lee?"
He said, "Do me a favour, son, won't you stay an' keep Anna Lee company?"

Take a load off Fanny
Take a load for free
Take a load off Fanny
And (and) (and) you can put the load right on me

Crazy Chester followed me, and he caught me in the fog
He said, "I will fix your rack, if you'll take Jack, my dog"
I said, "Wait a minute, Chester, I'm a peaceful man"
He said, "That's OK, just feed him when you can"

Take a load off Fanny
Take a load for free
Take a load off Fanny
And (and) (and) you can put the load right on me

Catch a cannon ball now, to take me down the line
My bag is sinking low and I do believe it's time
To get back to Miss Fanny, you know she's the only one
Who sent me here with her regards for everyone

Take a load off Fanny
Take a load for free
Take a load off Fanny
And (and) (and) you can put the load right on me