I attach my guylines to the stakes with a clove hitch and put the tensioning hardwear on the trap/poncho side.

I take about 1' of parachute cord and make a loop inside the tensioning loop of the guyline. The parachute cord loop is then girth/lanyard hitched to the tie loops of the poncho.

The parachute cord loop attaches/detaches easily. Not a perfect solution, but the one I use.
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"In theory, theory and practice are the same. In practice, they are not."
Yogi Berra