+8 on UQ. You can use a sleeping bag, blanket or whatever as a TQ. The UQ is unique as it has to go around the outside, so that it's not compressed. Use a 0* down sleeping bag in a hammock & you'll likely still get cold in 30* weather. But you can get away with a good 30* UQ & a 40* sleeping bag for a TQ.
Try a pad a few times. The biggest problem I encountered was cold shoulders from the pad not being wide enough & kind of sweaty as there's no air movement.