When this thread started, I was interested, and considering this for my Megatarp. Then I throttled back.
1. I don't camp on top of my hunting areas. Depending on species I am 100 yards or so away (turkey) to 1/4 to 1/2 mile away (deer/elk). The noise issue is.mitigated that way.
2. Most of my field time is below the timberline and spent in a hammock with an overcover. The one time I wanted a tarp while in a hammock rned my way of hanging a Megatarp would have turned a three sided shelter into a two sided shelter, since I ran my whoopie sling through the velcro. I was able to seal it back up with velcro, which I could not have done witha zipper.
3. Like many addictions I can't afford this mod monetarily, and since I am a cheap bastid I have lots of heavy stuff, and need to save ounces where I can...
4. I am still interested in this thread in case I am in a position where I deal with these issues and be able to have this done.
My needs may be different than yours, and needs drive the gear train.
pat