"Runes and the English letter values assigned to them by Tolkien, used in several of his original illustrations and designs for The Hobbit." - These are the normal values for Anglo-Saxon runes, and not at all what Tolkien used for Dwarvish - he mixed them all up!
Bilbo really did 'suffer least' of the bearers. At least if you believe his own account of things. One of the things I've decided is that the Jackson movies of The Hobbit work best if you treat them as what actually happened and the book as Bilbo's 'sanitized for Hobbit consumption' version of them.