I have been working on equipping my New to Me MH so I may be of some assistance
Rhino flex sewer hose kit has everything you need to multiple type hookups
Expandable hose ramp
A Paper towel rack in the compartment
Short garden hose for flushing the Tanks only to be used with Waste tanks.
Black water tank treatment
Grey water tank treatment
Toilet Paper Specifically for RV use, Don't make the mistake of taking a roll from the stick house.
Fresh water Pressure regulator
Fresh water filter and assorted adapters
Fresh water Hose
Fast fill nozzle with shut off
Spring Fresh to sanitize tanks and lines
Garbage Pail collapsible
Voltage regulator, Optional
Extension cords 50 amp and 20 amp
Adapters to go from 50 amp down to 30 amp down to 20 amp for maintainence charging and home use.
Cheater Cable plugs in to 30 am and 20 am to give you 50 amps
Phone Cable if you still want to use land lines, I don't.
30,000 # Tow Strap
Truck tire plug kit
Towing accessories if you plan to tow.
Jack pads stack-able Valterra
10 x 20 out door mat for under the awning.
Coffee maker Kreurig
Blender for Drinks
electric hand mixer
Of coarse Plastic Glasses, dishes, bowls coffee cups, eating utensils, dish towels wash cloths oven mits, bath towels wash cloths, soaps, etc etc.
A Genturi exhaust pipe for the generator
Long handle wash brush and window scrubber
5 gallon bucket
aluminum duct tape
Portable Tool Kit
The most used Items so far, Cordless Drill with Square drive bit and an assortment of replacement screws.
White board to write stuff on when you come across issues and Ideas, I use My iPhone Note pad.
Magellan RV9165T-LM has Good Sam Trailer Life Directory, we used this a lot just on our first trip an I see myself using it more on the next.
I will add to this as I remember stuff.