I don't think its worth the space and weight in a bug-out bag. I try to keep excess alcohol in the house for bugging in, though.

The obvious uses shouldn't be underestimated. There's a strong psychological element to survival. Comfort foods are important; a bit of comfort can make surviving seem more worthwhile. Although if brandy is your comfort food you are maybe in the wrong forum.

I'm dubious about its value as trade goods, unless it is a very long-term thing. As your final comment suggests, it may have value as a "hospitality good" - something to share for free with people you hope to trade or work with.