I immediately regret this decision!

Dungeons & Dragons: Encounters
Hoard of the Dragon Queen
Session 1

In our merry caravan, there was a Dwarf Cleric, a Halfling Monk, a Human Ranger, and a Human Wizard. The Cleric had come upon the Ranger some time ago, and since their plight was the same, they decided to travel together. Along the way they met the Monk, who was very fond of his own homebrewed ale. The party got along quite nicely. Shortly before arriving in Greenest, the Wizard joined the tipsy party; He was making his auto-biography of exploits on his way towards delusion*cough* I mean, grandeur.

As they crested the final hill leading to Greenest, instead of the cozy little town they had expected, they were met with the sight of burning buildings, scared villagers running wild before raiders, and a blue dragon attacking the keep. Quickly, the party rushed into town to help with what they could. Their first encounter was against eight kobolds trying to slay a wounded family. The party dealt with them in quick succession and were told to make for the keep.

Along the way towards the keep, the party found more villagers to rescue, and fell many more of the raiders. Just as they ushered the last of the villagers into the keep, a horde was bearing down upon them. Twenty-some odd enemies ran at them, cutting the keep off from the rest of the town. The party didn't even flinch as they faced these foes. They were able to take out almost half of them before the Cleric and the Wizard fell, forcing the Ranger and the Monk to drag them all into the safety of the keep. Villagers quickly stabilized the fallen party members.

Now that they had made it into town, what are their plans next?