This is why I pack a tarp in my EDC bag. If it's a matter of survival...me or the tree...then I'll saw as many as I need...but if I cut down a tree, I'm going to use all of it. Cedar is amazing wood for so many things...especially to somebody skilled. To cut one down and just leave it is terrible. Otherwise, I'm going to sleep under a tarp or space blanket. At least then I can make a pine bough bed and take boughs without killing any trees to do so.
Any time I want to construct something when I'm out in the bush, there is never a shortage of dead wood around...you just have to work to find it and bring it back sometimes. I love being near rivers for that reason. Drift wood is great. Unfortunately there are fewer and fewer untouched parts these days. The last time I went down to the river to what I thought was a secluded place I found about a half dozen warehouse pallets and the remains of several more where they were burned on a sand bar...the braces and nails were still there ready to be washed away the next time the water level rose....just dumb.