Well I'd also review the spices you intend using.
I certainly wouldn't associate juniper or spruce tips with holiday brews - presuming the reference to holiday, meaning christmas/new year period.
I'd be thinking cloves, allspice, cinnamon, nutmeg and the like. Also quite sweet almost like a mulled wine type thing. The sweet wine is relatively straight forward. Then as most of those spices will extract well in the presence of alcohol, split the batch into as many as is needed to infuse each spice individually to your own taste then blend.