Love our camper - pretty similar to yours.
There is no way to provide a full list really. Just go camping the first time and start making a list in your phone of everything you need to get and pick it up before the next trip. As long as you've got a water hose, dump hose, electric cord, chocks for the wheels, levelers and a crank for the jacks, basic tools, a spare pack of fuses, and enough kitchen utensils and other stuff inside to get by, then you'll be fine first time out.
I'll try to add a list of everything I can think of, but this certainly isn't everything:
water pressure regulator
tow mirror extensions
toilet packets (little tabs to keep it from smelling)
extra hose if your unit has a black tank flush
hitch with weight distribution and sway control
drill bit for raising/lowering jacks (assuming yours aren't electric)
basic tool kit
broom & dust pan
shelf paper so stuff doesn't slide around
multi-compartment plastic bin with handle to put your shower stuff in when you're traveling
paper towel holder
extra towels/rags for bathroom
soap for bathroom & kitchen sink
sheet set for master bed
exhaust fan padded inserts for insulation
kitchen dish scrubber
trash can & bags (kitchen & bathroom)
Make sure the lug nuts are torqued right and the tires are at the right pressure and double-check your spare. And I would pack a lug wrench and jack that will work on your trailer since your truck equipment probably won't.
Have a good time man, we love ours!
Life can only be understood backwards; but it must be lived forwards.
- Soren Kierkegaard