And don't forget the car kit:

Obtain a spare car key (in advance)
miles of 550
old tins
shaving cream
confetti
rice
balloons
hydrogen gas (optional)
a moose head (or similar) - stuffed
cardboard or poster card
thick markers, multi coloured
gaffa tape
streamers


and then there’s the luggage kit, things which the bride and groom may have neglected to pack for themselves, but you could add to their bags for them .......