Can you use two tablets at the same time on the P3p so someone can take photos while I fly and view what drone is doing?

You could fly the bird visually. Use a longer USB cable and let someone else control some of the camera functions. I believe you would still have to control the gimbal angle. Don't remember seeing a function for that on the tablet menus

No you cannot use 2 tablets at the same time

I wonder if you had a tablet that has a HDMI mirroring, if there was a way to mirror to another device, or to a small monitor.. you could use that for FPV, with no touch controls, just display, while someone else could control the gimbal and take photos.. you would still have to yaw....

For that function you would need Inspire..