When we received our barrel it still had some whiskey in it. You should be able to lay it on it's side and rotate it once in a while to keep it sealed. Worked for us. We also kept it in a cool basement so it wouldn't dry out as fast. The beer is amazing and people are just shocked that some home brewers could make such a beer! Have fun! it's as much fun to share as it is to drink!
The difference between ignorance and stupidity is that you can fix ignorance... if you're not stupid!