The hitches I'm referring to are the same thing you recommend, just a small stopper knot. I haven't tried moving the cordlock over one yet. That's a great idea to have different settings for multiple conditions. You learn something new every day!
Claustrophobia seems to be abating now that I'm wearing fewer layers. At one point I had way too many layers on and then the sleeping bag, and had rigged so that my head was much lower than my feet... GAH! I FLEW out of there from a deep sleep and had to go walk around to calm down. I still wake up now and think about it a bit, but have at least been able to get back to sleep. I think tarp tensioners would help me with that as well. I'm getting quite a bit of "tarp wilt"
closing my tarp in on me at night...
Things are MUCH much better though. I'm looking at the weather and the schedule for the next few weekends to see if I can get back out there soon.