I still think releasing to single flag out line is best approach in strong winds, assuming an open beach with no kiters around to land you, and no beach goers in the landing zone. If the kite lands on its back you can tug the line to get it to flip over. Then I disconnect from the bar (to avoid getting dragged if the kite should somehow relaunch), and walk up the single line slightly off to the side to avoid getting tangled in line. At the bar I carefully work through to the other side and continue up to the kite. I generally disconnect lines and wrap them, rinse the bar and board, then pick up kite and walk to a more sheltered location to deflate and pack it up, although most folk seem to do that on the beach, which ends up with a lot of sand in the kite.
I often kite on lakes, and there we have little room for landing and often noone to help, so we routinely dump the kite in the water and walk up the single line to it. That could work at the beach too if one was worried about a rocky shore or no room, but seems a bit more risky for the integrity of the kite, and I've never had to do that.