In my PG harness, I carry:
~140 feet of 5mm Perlon
Two long climber's slings
Two locking carabiners
Leatherman-style mult-purpose knife
A 'drop bag' - the purlon is 'piled' into the bag - not coiled.
Also,
A whistle
Headlamp
Radio
Cell phone
Thermal blanket
Compass
Butane lighter
Water purification tablets
Water bottle
When I fly PG over trees (all local sites), I wear a climbing harness with a climber's sling and locking carabiner. The sling is fanfolded and rubberbanded so I can easily pull the Carabiner out and secure the climbing harness to the tree
I figure I'm more likely to land in trees in a PG
In my Truck, I keep a black backpack with ~160' of 8mm purlon, a bunch of webbing, Carabiners, and a descender. This is part of the kit and I put it there assuming that I may need someone to help me with it, or I may use it to help someone else. What is missing (that I want to add) is a pair of tree climbing spikes and a tree climber's harness/belt.
In my hang gliding harness:
I don't have room for the purlon and I don't wear the climbing harness.
I have a climber's sling fanfolded/rubberbanded with a carabiner attached to a structural point inside my front storage puch so I can secure myself in the tree.
I also carry the spaceblanket, tools, etc in the HG harness.
Also in my front storage pouch, I have a 'drop bag' with ~120' of military parachute shroud line piled into it. The bag is a ziplock baggie with a lead weight taped to the bottom. The bag is covered in duct tape so it won't rip. The idea is to drop it down through a bunch of branches and leave with some confidence that it will make it to the ground so the 8mm purlon and descender can be attached and pulled up.
I'm not confident that dental floss will make it to the ground, or that dental floss will successfully be able to pull 80-100' of purlon up into the tree.
I suggest we have a tree rescue clinic so we can actually practice using our equipment.