It'll be interesting to see what procedure they have for that. I can't imagine they'll allow people on the barge to secure the stage while the RCS is firing.
I also doubt that, but right now, it is also none of their problems.
Any technical solution to securing the stage after landing for transport adds complexity and can turn a successful landing into a disaster. A flat even surface, not too slippery, is everything that is needed right now, even if the stage could get lost seconds later.
Should I see a live stream of the landing, my expectation of success is that easy: "touchdown, 21, 22, 23, 24, 25 ... VICTORY!" Everything that happens after 5 stable seconds is optional.
For later landings, it would make sense to develop systems that interlock with the landing gear for initial stability. Later you can manually center it and lower it to horizontal position for transport.