EvoLite

Big Agnes Zoom UL... It's so comfortable, 3 in thick and much wider than my older Thermarest Evolite. Also much lighter and rolls super compact.

With everyone recommending an Xped or Thermarest, I think you should check into renting one. Personally, I use a 2” thick Thermarest and can confirm it’s comfortable and very insulating. It has also lasted us 15+ years so far. As for sleeping bags versus blankets — hands down, I think a bag is warmer than blankets. Women’s bags are shaped to have lower volumes and more insulation where it’s needed. You can get polyester fill or down, with the latter being a longer term investment when stored properly between uses. My wife and I have 40F bags that zip together, and can be supplemented with a fleece liner when temps require it. We also have 20F mummy bags for when it’s cooler. At night, change into sleep specific wear. My wife and I use our Smartwool base layers used for skiing for this. A fresh layer of clothes have no moisture in them from daytime activities and will keep everyone warmer. Finally, the larger the tent, the more air that needs to be warmed. While we enjoy the space of our 6P tent, we also have smaller tents (one of my vices is buying tents) and one 4-season tent we use in the spring and fall cooler temps. Have fun. Bring layers. Plan for hats/gloves in the early morning while enjoying a hot cup of coffee.

I have functioning thermarests that date back to the mid 80s. Later ones are still good.

My first winter camping trip is one I’ll never forget, my back was killing me after trying to sleep on a foam pad. The next trip, I brought a Therm-a-Rest Self-Inflating Pad and it literally changed everything. Suddenly, I was sleeping warm and supported, ready for morning hikes. I’d recommend [air mattresses](https://www.reddit.com/r/KeepThisInMind/comments/1ltzxk1/recommend_the_air_mattress_best_for_camping/) for camping to anyone, from lightweight backpacking pads to thick car-camping mats, especially for winter trips.

I've used a self-inflating Thermarest under a Big Agnes pad...half inflated

The classic self inflating thermarest pads are very comfortable and durable, particularly if paired with a cot