After celebrating its 30th anniversary last year, what does the Boston Wine Festival at the Boston Harbor Hotel do for an encore? Besides its usual array of seminars, dinners, brunches and guest appearances by winemakers from across the globe, the country’s oldest wine and food extravaganza has added the Indulge Presidential Wine Experience, a special overnight package that includes a private wine reception in the John Adams Presidential Suite. It all starts with a grand opening party on January 10 and lasts until March 27, with January highlights including the ever-popular Battle of the Cabernets (January 16 & 17) and a Châteauneuf du Pape dinner (January 31) crafted by festival mastermind, executive chef Daniel Bruce (pictured) of the hotel’s acclaimed Meritage Restaurant, along the way.