There was a time I slept on the ground with a cheap sleeping bag.
Do you remember those days?
This year my sleep system for canoe trips [the whole nine yards, as they say] looks like this.
Cot, mattress, sleeping bag, pillow & toque.
Everything folds down to take up less space but when folded out it makes for a very comfortable evening. I wear a toque when the evenings get cold. There are some evenings the temperature drops considerably. This year I purchased a Chinook Fireside Hooded Rectangular down-filled sleeping bag that weighs 1.9 pounds. There is nothing like stretching out on a full-length cot, on a soft mattress, in a cozy sleeping bag, with a comfortable pillow for my head and a toque that comes with a night light.