Thanks for the compliment!
First of all you need to keep yourself warmth, Jan is the deep winter, should be quite cold by then.
If you are on a group tour, god bless you! Haha...!
Ok, back to the topic. You must know what lens and capability the lens have. Then consider
what you are going to shoot, eg..potrait of your loves one with some landscape in it or purely
landscape? Then you decide which lens to bring along.
The place you will be visiting might be different from mine, say Italy....mostly visiting to the
museums or churches I suppose, you probably need a UWA lens for that. And mind you,
certain part of Europe (London:dunno

, it is against the law to shoot people without
consent at certain places. Correct me if I am wrong.
For my trip, I bring along 16-35mm, 50mm & 70-200mm but the last one was the least to use.
Hope this will help.