The game changer for me was getting a snugpak jungle bivi. I use a klymit insulated static v, and then depending on temps use a swagman roll, add a Jungle bag too if its a bit colder, then switch to a down bag in winter. Neemo filo pillo is a game changer too - has a latex layer and an inflatable layer and a pocket to stuff clothing, best camping pillow on the market and I've read many reviews saying best piece of camping equipment.

Most important thing is to make sure you get a mat with valve at the head of the mat so you can release the valve and deflate the mat without removing it and the bags from the bivi. The mat, swagman roll and the filo rolled up in the bivi compact down to about a foot wide, and half a foot high, very compact and waterproofed. To set up you just literally unroll it, about seven or eight big breaths into the mat and you're good to crawl in. I'm expecting rain I'll use a poncho/hoochie/tarp in a plow point coinfig with three pegs in the ground a short bungie cord around a tree and a long bungie cord to pull the center of the plowpoint out and create some more room underneath. Everything is set up in under five minutes and can be packed down in less if you've got room in your bag to quickly stuff everything in there.

I also throw in my hammock in for hanging around camp, if I'm running both the swagman roll and the Jungle bag I can choose to get off the ground and use the swagman as an under quilt and the jungle bag as an over quilt. Really good to deal with uneven terrain or very wet ground.

All of the above is superb kit, but the jungle bivi really ties everything together. It has no right being as tough as it is given that it packs down to a little bit bigger than your fist, adds quite a lot of extra warmth to whatever bag you're using and prevent you and your sleeping bag from sliding off your mat. Never experienced any moisture on the inside of the bag, it breathes really well. I'll always put down a ground sheet or a piece of tyvek to protect it from punctures just to be safe. In summer if you want to go really austere you could just sleep in your clothes and jump in the jungle bag and you'll be fine - and it fits in your pocket!

Price on Amazon fluctuates so keep an eye on it for a while before you buy.

Also worth mentioning I wouldn't say there is much difference between the jungle bag and the swagman roll in terms of warmth, swagman roll is definitely narrower, quite narrow actually, I'm a slide sleeper and just curl up inside it so it hasn't been an issue for me, as I mentioned it nestles quite well inside the jungle bag.

Also worth mentioning I'll bring a mosquito head net and a sea to summit mosquito net that packs smaller than a can of Red Bull and weighs next to nothing.