On socks, probably not so important with cycling as opposed to walking, but if your feet get wet from rain or sweat, in bag make sure the socks are unused and dry, if your feet are wet etc, socks hold the moister in and feet will not be dry enough for next day, blisters will form quicker.
I find that I sweat quite a lot in sleeping bag, even if on the edge, so I expect sweats and come early in the morning chills even shakes too, sun up that normally subsides.
Most difficult to get comfort just right, if you have been exercising in the day, and tent is well vented over night (mesh 3 season), wind blows and inner space is colder.
Personal taste and some of us are colder, make sure inner clothing if you wear any is lightweight as possible to minimise moister retention and thus chills later on which can wake you.
Colder people need more insulation for sure.
Be careful against any tight spots in your bag, this will give cold spots which you may well feel.
A lightweight bivvy bag breathable is a good thing to have, I found that on my latest jaunt I got wet overnight in a downpour (long story) but wet and cold got into bag and bivvy and warmed up, cheap bivvy £23 waterproof and breathable suposidly, had zero condensation with a dry bag when I got up. 360 grams you could probably get lighter, a must if you intend to camp, makes a good emergency shelter if caught with no shelter in a downpour.
Things guaranteed to depress you, cold, cold and wet, cold and hungry. Wet and hungry I will take as a better than the formers.
Always carrying some emergency rations is mandatory for me.
When camping with another in same space, I could notice it was warmer, whether this is simply down to less air to heat per person or simply less air hard to say. So possibly less air in the inner is warmer?
If You Don't Try You Don't Do.....Don't Do You Don't Get...I'm Still Trying....Well Very..
You'll Find Me At The Top Of A Hill...............Somewhere...After Dark..