Good sensible approach ... test things gradually so you don't experience too much discomfort all at once.

By the way - I always thought that foil sleeping bags were a complete scam. I don't care what the advertising says. You will freeze to death on a cold night if all you've got is a piece of foil to keep you warm. The foil bags may have some value as a heat reflective shield - but only if you have some other source of heat. You might put them up as a "reflector" near a fire and they might reflect a bit more heat on your body. But they are NO substitute for a proper sleeping bag, plus staying warm and dry. You need real insulation to retain heat, or good fire building skills.

Good sleeping bags have weight to them, and they are bulky. It may be inconvenient - but it's needed. People need to come to the realization that some gear is essential, and pack their emergency supplies accordingly. I'm not saying that survival is impossible without a sleeping bag, but the skills required are more demanding and the experience may be very unpleasant.

America is infected with far too many scams. There's a lot of "intellectual junkfood" on the Web that deceives people into thinking they have a solution. That's inexcusable when it comes to a serious topic like survival.

The good thing about a survival forum - like this one - is that readers have time to go and check ideas ... and see what really works.

Try things out and REPORT back the real facts.
That's what's important.

Pete