Advice on Changing Pads in a Parking lot

I'm not familiar with kh, but pretty sure you gotta pull the calipers whether you like it or not.

I just rested the pistons on something hard like the rotor and pushed the caliper to push them in, or push the caliper back n forth on the pins/ways to get started and then rock/pry the caliper on the rotor to retract them.