I am paranoid about equipment failure. We travelled with a 5DSR and 5DIV, 2x 100-400mm II, Sony RX10 IV, 2 Canon chargers, multiple USB chargers, MacBook Pro, iPad Pro + 2 chargers, card reader, several extra cables, various types of adapters and spare batteries galore. But, we only used 1 card in each camera and downloaded each night and backed up on an SSD drive. We also both took shots. Card failure is the one area I don’t seem to worry about. Computer and chargers worry me as well as cables. It transpired that the MacBook failed to recognise our cameras and card reader but the tablet saved the day.