I haven't ever brought alcohol on a backpacking trip, or any camping or hiking trip, not the drinkable kind anyway. I'm not totally opposed to the idea; I just don't typically drink that much. If I ever did, I think I'd bring a small amount of everclear and mix it with kool-aid. That's the lightest thing I can think of short of drinking straight everclear (no thanks).
The journey is more important than the destination.