New to us trailer, outfitting it.

[TxTwoSome]

Make sure you have a lug wrench that will fit the TV, Trailer and the spare tire.

I bought a collapsible four way from Harbor Freight works great.

[YoLeven]

I was looking for a link to a 50 minute youtube video I watched about a year ago but couldn't find it. It showed all of the little things that make living in a small space safe and comfortable. That's where I learned to use a couple pieces of 2X10 and 1X10 for leveling, Y mount for your hoses at your site, 90 elbow for fresh water supply, pressure regulator.
Things I haven't seen mentioned: axe or hatchet and small sturdy shovel, gas lighter with long nose, to light stove. insect repellent. Some minor electrical tools and parts. check continuity, replace fuses, repair crimped wire connections.
I personally have 2 5/8 50ft hoses plus a 25ft city water hose and a 25ft black water hose. I made 5 12x12x6 blocks of wood and painted them, for leveling. 30 ft. 10ga extension cord. Battery cables, nice work gloves for setting up/down and rubber gloves for blackwater work, big can of Lysol spray (spray everything before and after), several small bottles of hand sanitizer to use as needed

[1bigmess]

I put wood blocks under the stabilizer jacks to spread out the weight on softer ground. For example, right now I am parked on grass, and the wood blocks are still being pushed down into the ground, but less so with the wood blocks. I had one eight foot piece of pressure treated two by six cut into four equal length pieces. Inexpensive, and much better than the short, skinny foot of the stabilizer jack alone.

[rbleau6885]

Besides all the obvious and other great things other people said make your self up a tool kit in a bag for the camper great way is to go to harbor freight also socket for your hot water heater drain small bottle jack with a beaker bar and socket for your lugs most everyone has a spear in there camper but I bet 90 percent couldn't change them if a flag occurred