Salt and Water

You always hear that lots of salt is bad for you.  And I can feel a difference in my body when I've had a lot of salt.  My fingers feel puffy.  Salt makes you retain water, right?  So I wonder if camels consume a lot of salt or if their physical make-up is naturally high in sodium and that helps them retain and store water.  Do they need salt licks?  Do they drink salt water?  How are salt, water and camels related?