I did not think about them encountering the
elves earlier, but that is a great point that you make about them entering the perilous
realm. I also think that because they were familiar with
Bilbo's stories encountering elves while certainly something
Sam wanted to check off of his bucket list, was still within the known world to them. That gets me thinking that may part of the reason for the enigma which is
Tom Bombadil, and also a purpose for the
Barrow Wights. These were powerful denizens of faerie which the
hobbits had no idea even existed. Tom Bombadil and
Goldberry in particular are magical
creatures with there magical abilities very evident. While there are times when the
wizards cast spells, and
Galadriel uses her mirror; most of the magic of the elves is subtle. Here in
the old forest the
trees cast spells to put the hobbits to sleep,
Bombadil has song that works magic, and Goldberry sings and brings rain. This is a place full of magic and wonder, and Bombadil is the Faerie King. That's amazing, and it is quite significant that they come out again at
Bree in the known world, but more prepared to tackle the quest before them.