You hand off the booze to the leprechauns, who are thankful for it and promise to depart the keep as soon as they're sober. The only thing you find in the ledger is the total wine the merchant hauled here. A quick inspection of the wagon shows that you can salvage some of it, but the rest is most likely staining the clothing of the fey you've recently killed.
Returning to the kitchen, Cirieo is in good spirits.
"Buck up lads, you've cleared this keep and armed yourselves with our weapons cache, the dragon should be a quick fight after this warm up." He whistles. "To think, we might be taking this region back after those filthy bushwackers wacked us!"
"Now don't you worry about me, I've got directions to this cave of yours and even with only one leg I reckon I'm still fit to traverse these woods. All the same, if you see a halfling sized pile of crap between here and your home, do me spirit a favor and track down what ate me."
With these touching words, you prepare yourselves to face a dragon.
And with that, you level. You'll need it. ;)