Bilbo uses his magic ring and his wits. He follows Gollum with the ring on and is able to leap over him to get to the back door. There he squeezes through, though he lose his buttons doing so.
Bilbo's escape plan is mediocre. He risked the lives of the dwarves while trying to carry it out.
Yes, in chapter 9 the dwarves (but not Bilbo) were imprisoned by the Wood-elves in Mirkwood forest.
They were imprisoned at the time he revealed the ring to them. Considering Bilbo used the ring to to go invisible and help them escape, it is likely that the Dwarves were grateful. Although they clearly disliked the actual method of escape (hiding in barrels which were tossed in a freezing cold river).
No, the goblins did not get Gandalf. Bilbo's yell when he discovered the goblins stealing things was enough to prevent him from being captured. Gandalf killed a number of the goblins with a big flash of lightening.
The elven frailty is wine. The elvenking's butler and the chief guard drink some wine, which caused them to fall asleep. This gave Bilbo the chance of stealing the keys to the jail cells, and escaping with the rest of the dwarves.
He was able to scream before the goblins grabbed them. That gave Gandalf time to escape and he rescued them.
They escape in barrels sent downriver to be filled.
Bilbo's escape plan is mediocre. He risked the lives of the dwarves while trying to carry it out.
I think it was Bilbo Baggins
if referring to chapter 10, the quick escape
The company isn't actually all with Gollum, only Bilbo. Bilbo uses the ring he picked up amid his wanderings to escape, which happened to be the one Gollum was looking for. It turns the wearer invisible.
Bilbo, with the aid of his wits and his invisible ring.
I think it was Bilbo Baggins
Bilbo was very careful to plug up all the holes in the barrels.
Yes, in chapter 9 the dwarves (but not Bilbo) were imprisoned by the Wood-elves in Mirkwood forest.
Bilbo and the dwarves escape the fire in the trees during their encounter with the Wargs when they are rescued by the Eagles. As the Wargs gather to attack the group, Bilbo and the dwarves climb up into the trees to avoid the flames. The Eagles, seeing the danger, swoop in and carry them away to safety just as the fire spreads, ensuring their escape from the perilous situation.
{| |- | Dori was the one who helped him. He climbed back down out of the tree and boosted Bilbo up. He was almost caught by the wolves as he scrambled back up into safety. |}