anybody ever use a marmot driclime trails sleeping bag liner/summer bag. the new ones rate at 35 degrees or higher.(that was hard for me to believe)not much to them? i have a 2 year old one i was going to pack for maine next month. a good source said 50-55 degress at night with a chance for a couple nights near the 35 degree night possible. so what do you think freeze at night or be alright. im sort of a hot sleeper