I did a 30 day hike in June and July with a 0deg UQ. There were only three nights I slid it off to the side. I'm also a cold sleeper and I say go for it. It may be more than you need but then just call it a luxury item. When it rained for three days and most were cold and miserable, I was in heaven.
"what do you suppose will satisfy the soul, except to walk free and own no superior" Walt Whitman