It depends on how often your freezer door was opened and how modern the freezer is. Some freezers are less prone to freezer burn. did you have any power outages since it was put in there?
The proof is in the pudding. Stating the obvious, the only way to know is to thaw it and have a snort.
I hate to throw out booze. Who's tagline is Hank Hill's quote about never pouring out beer, even to put out a brush fire? That's kinda how I feel about it but...
I guess we'll make a fresh batch for the party.
Thanks to all for the advice.