First I want to say, that I am now getting in here at Chapter 6. So, I have not read the earlier chapters (sure I have, but I am starting now to read from Chapter 6). Thus just let me know, when something has already discussed.
The first thing, which got my attention was a phrase from Gandalf:
I must see if I can't find a more or less decent giant to block it up again, [...] or soon there will be no getting over the mountains at all
What was Gandalf's plan concerning the goblin-gate? He couldn't really mean to find a giant, who blocks the gate with a huge stone. Does this formulation is caused by the circumstances, that the 'Hobbit' is a children's book and does this fit only in the context of the 'Hobbit', but not in the context of later Middle-Earth.
Maybe he really meant the Stone-Giants, which they have seen before.
On the other side, Gandalf could have made some kind of joke and only wanted to say, that this is a serious problem and someone, who is powerful enough, has to solve the problem. But the Dwarves should not care about it now.
Also, the flight always remember me at the Flight of the Fellowship out of Moria.
"We must be getting on at once, now we are a little rested," he said. "They will be out after us in hundreds when night comes on; and already shadows are lengthening ...
It is a very similar situation. Coming out of Caves, which are 'populated' by Orcs/Goblins, Have to hurry, because the Goblins are not yet here, but coming soon.
One word also drew my attention:
christmas tree
Where did the narrator get this word, because there is no christmas-tree in Middle-Earth, because there is no christmas.
But I think, that this is caused by another instance, the narrator of the story was surely not an inhabitant of Middle-Earth, but of our World and he is the one, who drew the comparison. He surely knows about Christmas ...
What exactly was the language of the Wargs? The fact, that Gandalf understand the language let me to the assumption, that it could be a kind of "Black Speech".
Concerning the Eagles, I wondered whether the name 'Gwaihir' was already derived, probably not, because then the 'Lord of the Eagles' were surely named.
The chapter ends with a very good ending for Bilbo. His stomach was finally feeling full again.
The question, what does Bilbo's dream mean bothered me, too. I have no proof, but my feeling tells me, that the dream is somehow related with the Ring. Maybe some foresight concerning his dependance to the Ring.
Another possibility could be, that he is now that long on the road, that his memory to his home has become more and more vague, so that he dreamt only from the House, but could not think about something else in Bagend.
But as I said, only speculation.