Beautiful guns, Richard.
For use with shot, a shot flask as Pukka B has shown, as well as powder flask or horn with a measure.
As far as wads, only the thin over shot "B" wads are needed, especially with a gun with no choke.
Pour powder as normal, press 2 or 3 thin "B" wads into the muzzle and push down 2" with a short starter.
Pour shot from measure (same as powder) onto the wads. Press into the muzzle another wad, then push the 'works' down onto the powder.
I won a trap shoot with this loading & shooting against guns with chokes. It works, but as normal, pattern testing should be done.
For use with ball, same "outfit" as with a rifle, except the ball should be .020" to .030 smaller than the bore.