I find that in winter, I can get by with a warm but not super hot UQ if i use a pad with it. I have a thermarest with an r-value of 2.6. When i add it to my no sniv on the bottom and my no sniv topquilt, i can go down below freezing comfortably. Keep in mind i am wearing EXTRA THICK wool socks to sleep in, a balaclava w/ hat attached, and merino wool baselayers. The baselayers are rated 200 (icebreaker). Pads provide a great boost of temp, if you can learn to sleep on one-they are less comfy than an UQ. But they have allowed me to go lower without having to buy another expensive uq.
Im glad you had a a great time on your first winter trip! Before the summer comes try to do a few days. If you can stay out there for a few nights you will learn a great deal from having that extra time to perfect your setup. It will only get better!
Enjoyed the videos, thanks for the contribution to the forum!