I agree 100% with
Oldtimr,
knowing what you can shoot is huge part of duck hunting
NOW< something your not mentioning is, what type of waterfowl hunting will you be doing and where>??
will you be hunting wild ducks, or plan on doing pay for hunts!?
are you hunting from a boat?, out of a blind?
jump shooting?
will you be on the ocean/ large lakes, rivers, streams
pond
potholes?
lots of different tools needed pending where and what type of hunting your going to do
do you have a DOG to retrieve them?
or HOW do you plan to get them if they land in the water??
all things you need to think about,
then, the supplies needed for the type of hunt your planning will have to happen
be them, , a DOG to recover downed birds, a boat or likes(canoe, ) waders?(life vest should be on MUST have list if near water)
calls, decoys, correct ammo that shoots well in YOUR gun(pattern testing and know limits on range)
and of course, legal rules , season's, and , limits, and so on!
so, lots of unanswered questions here,
you need to answer maybe, to give you maybe better info or help IMO !