Here's what I've gathered so far for a hammock that balances strength and low weight. I'm not worrying about the bug netting or fly for now - just the hammock.
I need it to support 400 pounds. Unlikely to ever actually have that much in it, but me (big), my kid (little), and stuff could come close. It builds in a safe margin of error and seems to be a common number (Travel Hammock, ENO, etc.)
Hammock fabric: 1.9oz ripstop nylon - buy 4 yards of 60-63". Use full width (halfway between a single and a double). Use 10 or 11 feet of length depending on how I do the ends. Make a few side pockets from the extra
Tree straps: 1.5" webbing. Probably Speer's version. Nice and long to get around the Pacific Northwest's big trees. Do people just tie a loop in the end and run it through like a girth hitch?
Rope/cord: 5mm seems to be strong enough for big loads with some room to spare. Rated to 1100 or 1200 lbs. Put a bight on the end and carabiner it to the webbing?
Am I on the right track? Will that hold me up - assuming construction methods are appropriate and done right?