I decided to go for it, purchasing the Camera Adapter kit
for the iPad 5 (Lightening connector)
It work! -- I can plug in the audio interface I wanted. Microphone into audio interface. Audio interface with USB plugged into the Camera Adapter kit
Confusion was added by this picture (above) showing an card reader pluged into the Lightening Camera Adapter USB end......
For a mistaken while I thought the card connector was actually part of the Camera Adapter kit.