For the next road trip, now that we have more room in the back of the Odyssey. This is definitely not a minimalist list, but it worked well for our Disneyland run in May.
Instapot
The small baby chair, with straps.
Water Boiler
Water Filter
Bottled Water
Toaster (optional!)
Grains and stuff for breakfast porridge (yams worked well too)
Fruits
Nuts
Beef Jerky
Granola Bars
Chocolate bars
Chips / Crackers (as desired)
Underwear for every day
Socks for every day
Undershirt for every day
Tank Top, every other day
Outer shirt, every other day
Pants + Shorts, every other day
Vest
(This collection of clothes was a bit more than necessary, but better than the alternative of running short).
Flip flops or slippers to go with the shoes (presumably one is on your feet when you leave, so the other is packed in the car).
Camping Mattresses (that sofa bed was not good)
Yoga Mats (so we can walk barefoot in the motel)
Picnic Blanket
Extra blankets for sleeping
Stroller (the kids don’t walk themselves)
Baby Carrier (maybe for the last time)
Books
Toys
Board game (one)
Clipboard, paper, and pens to draw with
Power Strips, Two (one for the phones, the other for the kitchen stuff)
USB chargers and chords (one for each phone).
External Battery pack (one)
Computer
Computer power cable
ipad (optional)
Using the Trofast bins was a stroke of genius by my wife. They are light and modular, easier to use than suitcases since our visit stayed at one motel the whole time. Even if we were hopping from motel to motel, then I think we would have picked out the next day’s clothes at the back of the van and then brought it up in one bin.