I see the lost Ranger is on sale again at REI... At least the long one for $165.00. My concern is no insulation on the bottom. I've always used a 48" ThermaRest pad. Should I go full length to take care of cold from the ground. Early May trips I've been on have been miserable at night due to the cold in the ground... or so I think. I can get a good deal on the Thermarest Go Light. Just concered that it is enough.