lightweight - my bivvy bag weighs 1kg, is Gore-Tex lined and cost about 80EUR some time ago
water resistant - I've slept in perhaps 20mm rain staying dry
you see the stars
setting it up takes ...
I did something very similar last year, solo. In fact, this is my camping spot on the banks of Loch Lomond, the last night of the trip.
Here's some detail on my tarp setup, using the bike as a pole (...