We also have a Leaf Plus S, and I can not see how 136 miles is not doable with a full charge even using resistance heat. So far this winter, admittedly not at 0F, we have not seen less than 3.2 MKW and we keep the car warm. Since little of the miles acroos NH are high-speed, that will help also. Assuming a full battery at 60KW, 136 miles is only 2.26 MKW. Keep us informed!
2015 Leaf sold
2019 Leaf Plus S as of 9/30/19