That was the resistive option yes because it would fit the board properly. For the capacitive option I was thinking of this one. https://www.adafruit.com/products/2423
Its not really going to be your standard picam, I am going to do 2 pi zeros, One with a Scroll pHAT and the screen, One with the Adafruit Ultimate GPS HAT and Enviro pHAT.
Both are going to have the USB Hub that has the ethernet adapter connected via a crossover cable.
Each is going to have a camera either ir or noir style and the enviro pHAT is going to register the light levels to decide which Zero should take the picture.