I don't so much use hardware as procedure...
When I can I fly over hard paving. That eliminates driving a spike into the surface. A hammer, or other similarly solid, hefty piece of trunk trash, can serve as a handle anchor. Out of a stooge, during landing glide, I try to set down so the handle is close to whatever handle-anchor I'm using that day.
Wherever the model comes to rest, the handle goes on the anchor, first. THEN, the model is picked up and walked back to the stooge stage, with the lines kept off the ground. Any slack, twists, or poor positioning, is walked out, before refueling for the next flight.
IMPORTANT: This is the opportunity to make sure stooge release and flying lines are clear and properly positioned relevant to each other.
15 years of occasional stooge use, and no (permanent) injuries.