For my 50th, my wife organised a visit to Glengoyne Distillery (they don't do any peat based whisky so for those afraid of a bit of smoke it's a safe place!). Had the obligatory tour round but as it was January there was only us two so we got plenty of time to ask questions and get shown in detail. I did the Distillers Mixing session as well which was very interesting and I got to bring home a lovely bottle of blended malt (after extensive tasting). I'd recommend it, it might be a bit remote but there are plenty of companies offering chauffeur services if you fancied fitting in some golf or general site-seeing. Enjoy!