Not easy if you are wearing a climbing harness. Arc'teryx's Gamma salopette has through-crouch zip and it is perfect for climbers.
Mountain Magic, MEC.ca, Vertical Addiction, Monod's in Banff
not by itself. you would probably want a down or primaloft type layer on top of it.
6"1" is in the tall range but your torso measurement should be the determining factor. Go to Arcteryx's website and follow the instruction of torso measurements. Your torso length dictates.
I bought one intended to use as a third tool. The grip was uncomfortable. It is heavy. I sold mine without using even once. The older version, Black 3 works much better. So I keep on using the Black 3.
Location: Mt. Whitney
I had the ULTRA bottomless bag wrapped over a Thermorest Full length inflatable pad. Then have a bivy sack over everything. I can sleep on my side and enjoy the freedom of changing positions.
It was too warm as the temperature was 40F.