This non-comprehensive list is a work in progress, but it's some of the things we've found handy to have in an RV. We'll be adding links to these products soon.
RV Oopsies - a great book that may save you from headache down the road
Setting up camp
Leveling Gear
Andersen levelers
Levelmate pro logic
Chaulks
Sewage Hoses and Accessories
Water Hoses and Accessories
Water filtration system
surge protector
camera for dog
fence for dog
outside rug
black tank flush adapter
black tank hose storage tubes
Diatomaceous earth
splitter valve for water spigot
quick connects
collapsible hose
hose water filter
sharkbite fittings
Connectivity & tech
T-Mobile home internet (if stationary)
Starlink
Solar panels
Easy choice wireless router
Pepwave router
propane tank level monitor
backup camera
Kitchen
Ninja toaster
airfryer
insant pot
bins for pantry
instant pot
ice maker
electric heater
dish dryer
electric griddle
Bathroom
shower seat
orange tabs
Cleaning
Washes and Waxes (for the RV)
small vacumn
hyper vent air flow
Stick vac
Quality of life
Water softener
Dehumidifier
space heater
fans
plants
ninja foodie
horizontal shoe pockets
vertical closet tier shelf
dysone heater cooler air purifier
cusisinart dual induction counter top
front window cover
rooftop vent blackout covers
keyless entry door lock
camping journal
Outdoor
clam pavillion
Bug fan
alventor screen tent
star gazer chair
jackery
Toolkit must-haves
Ratchet straps
Zip ties
Gorilla tape
Collapsible ladder
telescoping ladder
Roof tape
spare awning strap
tube of caulk
flash light
step stool
spare batteries
Small tool bag
Rubber mallet
bed struts
multi meter
eternabond
Battery lights
bottle jack
Travel day
Sway Bar Recommendations
anti sway hitch
tire monitor system
Battery monitoring system