Look at the antennalaunchers.com design. That should give you a good idea how to deploy the line. It works very well. Also, use Spyder fishing line. Very light and strong.
Yeah, I thought you were joking 😉. My transmitter is pretty cool, it’s tiny and amazing that there’s GPS and a thermometer and barometric altimeter built in. Wouldn’t take a very large pico balloon to carry it, but I guess it’s not tomahawk...
You could isolate it with a long kite string- I’ve always thought a WSPR balloon would be cool. I got one of those little transmitters for it but it’s lost in my closet now 😞