Don't count on what the dealer gives you to be usable. cheapest junk they can find.
Also we bought almost everything for our camper at amazon, but you may find the same items at Walmart cheaper and its easy to take back to Walmart if you get something you don't need.
Get the minimum to start you will end up getting a bunch of stuff you will never use.
The keeper items we bought and use almost every trip are:
RV TP
Black tank chemicals we have a bunch of this walmart clearances it a lot when the package changes
Good sewer hose (2 10 ft pieces or 2 15 ft pieces)
Short fresh water hose about 6 ft works for us at most camp sites and you don't have a 25 ft er to roll up all the time.
Get a 25 ft hose too just in case you are at a dumb camp site and the hook ups are on the wrong side
water pressure regulator
water filter
10-15 ft black water hose
water hose T with individual shutoffs (Drinking water safe some have lead)
Flush King best thing ever when you have full hookups.
stacking square pads or blocks
drive up tire changer / leveler - we Have not used it yet, but count it as insurance
https://www.amazon.com/Trailer-Aid-T...-1-spons&psc=1
bar that goes across the screen door
extra water heater plugs
Rectorseal 23710 1-3/4-Ounce Tube T Plus Pipe Thread Sealant - Seals way better than tefflon tape and you smear it on like tooth paste instead of trying to wrap it up like the slippery tape
first aid kit
benadryl
poison ivy cream
YM W4194 Solid Rubber Wheel Chock with Handle, 8-3/4" Length, 4" Width, 6" Height - Pack of 2
Fastway 80-01-2160 Zip Breakway Cable, 6'
Sold by: Amazon.com Services, Inc
$10.05
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Basic tool kit i took a Plastic Ammo box and put some tools from the house in it. adjustable wrench. square head screw driver for those trailer screws that wiggle loose. channel locks for water hose connections, pliers hammer, lots of zip ties, gorilla tape in a zip lock bag so it stays fresh.
extra garden hose rubber o rings
Junk we bought and have never used or rarely use, but still pack around:
Camco Water Bandit -Connects Your Standard Water Hose To Various Water Sources - Lead Free (22484)
Sold by: Amazon.com Services, Inc
$8.23
Camco 20ft Sidewinder RV Sewer Hose Support, Made From Sturdy Lightweight Plastic, Won't Creep Closed, Holds Hoses In Place - No Need For Straps (43051)
Sold by: Amazon.com Services, Inc
$33.52
Conntek RV Y Adatper with 50 Amp Male Plug To RV 30 Amp and 15/20 Amp Female Connector (3-Feet)
Sold by: Amazon.com Services, Inc
$128.99
Leveler Ramp Chock Multi-Leveling Blocks (Pack of 2) for RV and Trailer Wheels
Sold by: Won Lane Product question? Ask Seller
$27.95
Camco Heavy Duty Outdoor Extension Cord for RV and Auto with Easy PowerGrip Handles- 30 Amp (3750W/125V), 10-Gauge 25ft (55191)
Sold by: Amazon.com Services, Inc
$33.81
Camco Sewer Hose Rinser With Power Jet Cleaning Action and Shut-Off Valve- Clean Out RV Sewer Hoses With Any Standard Water Hose Connection (39533)
Sold by: Amazon.com Services, Inc
$6.82
RV Camper Cord Adapter 15A Male to 30A Female 12inch Power Connector (CR1530)
Sold by: Hey RV
$14.59
lots of extra water hoses