I find a thermarest is warmer than a camp bed. Camp beds let the wind go underneath you so you're getting cold from all directions. If you do want to use a camp bed, then you probably need a thermarest on top of the bed, as otherwise you'll only have the squished bottom of the sleeping bag and the canvas of the bed between you and the outside - the squished side of the sleeping bag doesn't keep warmth in much at all, and if it's a normal army style bed, they don't have any insulation either.
Is it a down sleeping bag or an artificial fibre one? If it's a down one, then when they get wet they lose much of their warmth, so you have to be very careful about getting them too wet either from the outside (damp / rain etc.) or from inside (sweating lots).
You might get good advice if you posted on http://www.outdoorsmagic.com/
Also, one of the posts says something about sleeping naked inside a technical sleeping bag - this link http://www.psychovertical.com/?maximisingwarmth seems to sort of back it up - as long as your bag is rated down to the temperatures you're sleeping in. Personally I tend to wear a fleece or similar, but often have it open. That link has lots of other good advice too, like doing a bit of exercise just before bed to make sure you're warm to start with, and making sure you're eating well.
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Date: 2008-07-23 01:58 pm (UTC)Is it a down sleeping bag or an artificial fibre one? If it's a down one, then when they get wet they lose much of their warmth, so you have to be very careful about getting them too wet either from the outside (damp / rain etc.) or from inside (sweating lots).
You might get good advice if you posted on http://www.outdoorsmagic.com/
Also, one of the posts says something about sleeping naked inside a technical sleeping bag - this link
http://www.psychovertical.com/?maximisingwarmth
seems to sort of back it up - as long as your bag is rated down to the temperatures you're sleeping in. Personally I tend to wear a fleece or similar, but often have it open. That link has lots of other good advice too, like doing a bit of exercise just before bed to make sure you're warm to start with, and making sure you're eating well.
Joe