Trailer Must Haves?

I think I've been talking about getting my own trailer for the 10 year extent of this blog. I finally went and picked one up this past weekend. 

It's never to late to achieve those goals, lol.

I ended up buying new because I live at least one ferry ride from anything and that pretty much automatically makes any trip an overnight one. It made me anxious buying used 'unknown' where I didn't know the maintenance, miles, or history. I know it's not a car and a trailer only has so many things to maintain, but still...given my middle-of-nowhere location I really need reliable and as few surprises as possible.

With the current used market super hot and prices approaching new, it became a no brainer to just set a budget, go to the dealership, and see what I could get. Luckily, they had the three trailer brands I was interested there to look at, and it worked out the one I ended up choosing was in stock and ready to go. The one I had originally reserved to pick up ended up not being the one I chose, so I'm glad I was able to get there in person and look, even though it meant a 16 hour travel day!

A few compromises were made, but this checks all the boxes for things I need - small and relatively light for our F150 to tow. Aluminum body that won't rust and windows that close and lock, since it's parked in our driveway in the Wet Coast rain.

So, that's accomplished. As a person who tends to like having only a very basic level of 'things', it still seems a little odd to have it sitting in the driveway. But, if ever there was a year when I'd deem a trailer essential (with Bridget's upcoming trips to the Island), this is it.

Anyway, as a newbie trailer owner who is planning multiple overnight trips...I'm hoping the more experience crew can make recommendations on what I need to stock the trailer with. 

It came with interior/exterior lighting, a water tank, spare tire, all that. The doors and windows lock, so I'm cool with storing trailer dedicated essentials in there full time. The tack room is not huge but I am a minimalist. It came with hooks, blanket bars, saddle racks, and organizers installed.

Off the top of my head, I'm needing a roadside kit for tire changes, I'm thinking a first aid kit, and the obvious practical things like trailer ties and hay bags. You wouldn't think trailer ties would be a rabbit hole I could get lost in, but with one horse who doesn't solidly tie, and one who has allergies and really needs to be free to travel with a lower head, I'm indecisive.

So, readers - any recommendations for must-have items you can't live without? On the flip side, is there a commonly recommended item that you didn't find useful?