Print a copy of the regs as to what must be carried in the aircraft and keep that in the back of your licence folder.
Worked for me back in GA. I had one guy on Horn Island try to ramp me whilst unloading and supervising pax. Told him to look outside the aircraft and I'd deal with him when I'd finished those tasks. Then I got the required docs out, placed them on the seat and told him that all the documentation he required was on the seat.
He looked at that, then asked to look in my navbag. I declined his kind request. In the end all was fine, except for one Herc strap was missing a loading label...