knowing how filthy these pads make every part near them, I suggest removing the caliper for cleaning during the service. this allows you the peace of mind to completly spray down ,and clean all the components involved, and inspect to insure the caliper is free of "hitch hikers" (debris/stones/grit etc) before installing the pads.
It also offers the best opportunity to clean the piston completely prior to pressing it inside the seals, if this isn't done, seal life is greatly reduced/compromised. A can of Brake-Kleen and an old toothbrush work fine.
I also smear a small amount of silicone anti-chatter paste on the interface of the pads to the piston, difficult to do with the caliper mounted.
Time spent is minimal, the knowledge it is done right is worth the time.