BOSTON GLOBE - "HERE, THERE, AND EVERYWHERE" TRAVEL COLUMN: Stay in style at Pickering House, a former historic homestead nestled on the shores of Lake Winnipesaukee. Opened since July, this boutique luxury property in Wolfeboro is offering a series of winter activities — onsite and off — designed to lure guests on the two-hour journey north of Boston. Stay in one of the 10 guest rooms and suites, some adorned with gas fireplaces and stoves, and partake of activities that include cross-country skiing on groomed trails, ice skating (indoors and out), winter hiking, and downhill skiing.