I’ve started using my 857D after collecting virtual dust for a very long time. I’m not particularly bothered about scratching it but I do care about offering it some protection.
Part of my solution is to separate the head and pack it more carefully than the main unit which I slip into a soft case that offers modest protection and then place it above extra clothing. Most of my trail tumbles seem to have me losing my boot grip and landing posterior down which is where the extra clothing comes into play.
This aside I am interested to see other peoples approaches as mine is somewhat optimistic which might result in tears longer term.