Rear rack on foam in a Pelican box. There is a backpack manu online with a suspension inside the pack but often people fall on the back. Do you have a connector for an external antennae ? Verizon sells a half wave vertical you can set into a reflector...see Northcountry Radio. I made one from 1x1 wood ant support/cardboard covered with Al foil.

are there online manufacturer tests for falling tablet flash drives ?