Get a room! grin

Just teasing.

In summer, I use a lighter bag (or even a bag liner), and I sleep in just my undies. In winter, I wear longjohns and socks, and occasionally a toboggan. I've yet to experiment with bag liner and clothes inside my bag, but from what I've read it won't make much difference. If you compress the insulation too much it won't work right so you'll end up colder.
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"Stand in the ways and see, and ask for the old paths, where the good way is, and walk in it; then you will find rest for your souls."