What elements of freedom are present in Elrond's kingdom which support the idea that free will is important for a person to be happy?

This is an interesting question for this chapter. The elves make welcome to all, but they don't question the need to move on. This would be an idea that supports freedom and happiness.

"You are a little out of your way," said the elf: "that is, if you are making for the only path across the water and to the house beyond. We will set you right, but you had best get on foot, until you are over the bridge. Are you going to stay a bit and sing with us, or will you go straight on? Supper is preparing over there," he said. "I can smell the Wood-fires for the cooking."