I have a North Face sleeping bag, mummy shaped filled with Dupont Hollowfill II. The tag says manufacture date is April of 1974, I remember buying this bag as a teenager and it has followed me thru several moves. If I may have used this bag 3 times at most. I am planning an October Tent camping/fishing/hunting trip in the Adirondacks and wondering if this bag is still good enough or are today’s sleeping bags “much, much better”? I have a couple of camp style bags rated at 30 or so degrees that work fine in summer or inside a cabin. I think the North Face is rated at 0 and above. I am a tent camping novice!