Thanks for the tip on the ground mat.
I don't camp nearly as often as I used to and very recently, suddenly, and unexpectedly got too old for the thin self-inflating ground pad I'd used without issue for the previous 20 years. A cot made things better, but my cot needs better padding too.
Unfortunately, general advice on what works is so wildly different between people, seasons, and conditions that I don't think I can help much.
Some of my camping gear is extremely useful while elk hunting. Some of it is worthless for elk hunting but is awesome while car camping on a fishing weekend. Some of it isn't worth taking for a 2 night trip. Some of it isn't worth taking based on location and/or season. Some of what I take changes based on how often I expect to move camp; am I in one spot for 3 days or moving every night?. What I take on any given trip can vary wildly.
With that said, I have lots of opinions on specific pieces of equipment. Many of which are probably going to diverge from others who have used the exact same gear under different conditions. Or completely different gear under similar conditions. If you have any real specific questions though, I can offer up an opinion or option.
With that said:
I like my JetBoil. I sometimes use it to make a super quick cup of coffee using the tea-bag style coffee. I've used it for canned soups and Ramen in a pinch too. It's great for cold camping when I don't want a fire. But I could live without it and not miss it much.
In winter I take two wool blankets. They get used more often than I thought they would. Extra ground insulation and/or extra blanket on extremely cold nights mostly. I've considered abandoning my tent on very cold nights and crawling under them both in my truck before as well...
A Coleman catalytic heater has proven very useful for me when winter camping on several occasions.
Any small grill set-up is sometimes useful. I've often found it's not worth taking on short trips where a cooler of premade sandwiches (or whatever) suffices.
I recently bought the Coleman Battery LED lantern. It's proven useful and is much less fragile than the gas lanterns I prefer. Especially useful for the camp sites on the far side of really punishing roads that cause lanterns to break and soda cans to burst.
https://www.amazon.com/Coleman-20000...80417598&psc=1
I'm old now and taking a pillow with me. The MyPillow pillows are machine washable.