Mike, you probably already know this, but a lot of body heat is lost by handling the metal tripod legs. I have mine wrapped in that insulation that plumbers use on pipes to prevent heat loss. Take your tripod to the hardware store, measure a section of the insulation and diameter and slit it lengthwise and it slips right over the tripod leg (upper section only). It also makes carrying the tripod over your shoulder much more comfortable.
Being a Maritimer myself, here's a 'downhome' solution for you -- two hot hard boiled eggs wrapped in foil, one in each pocket. By the time they have cooled down, you have a snack for the walk back.