I think you should more look at where and when you plan to camp.
I guess you could look at you camping habits up to this point.
We camp in a tent usually at off seasons when there are less people with colder mornings and chance of rain.
We did once take off to NM for a week and the mornings were very very cold as we got higher and higher in altitude. If you travel to the mid west and east you will have more humidity, or where it rains often, the southwest to the coast tend to be hotter and more dry. the Mountain states will have more snow as well as east of the Miss. River. The deep south sees little snow but it can get cold there too.
If you don't you might want to keep extra blankes or bring along sleeping bags incase.
If you do add insolation you will have thicker walls not not only reduce cold at night but thicker walls mean it can keep heat out as well and the difference in pulling weight would be very small.
really comes down to what flavor camping you like. Do you go to sleep and relax during the worm months, or do you go because you want to visit or see sites you have not seen and are not controlled by weather.

or just a need for new sites
How well do you adapt to changes in the weather,
my wife wares earmuffs in tempetures most of us would wear a light jacket in. where she was bung up she has never seen falling snow. am I putting in insolation
