1) Any materials from home associated with on a day to day basis, like blankets, pillows lounged on, etc.
2) Hay Box
3) Litter
4) Treats
5) Pellets
6) Cleaning materials (i.e. vinegar/water spray, wiping towels, pee-pads)
7) Record of vet bills/medical history (just in case something happens and a vet at the location asks specific questions)
8) Syringes for CC and antibiotics if needed; left-over metacam/probiotic if you have it
9) Small rugs/other mats to lay down in the free-roam space
10) NIC grids and zip ties for rabbit-proofing on site

I’ve never traveled with Luna before, but here’s what I can think of:
– Medical kit (cc, simethicone, benebac), and recon of ER vets (which you already covered)
– Grooming supplies (maybe trim her nails before you leave so that you don’t have to do it while you’re on vacation)
– Blankets, car window shade, frozen water bottle
– Cardboard box/cutout to keep hay in place in car carrier, and water bottle that can hang in car carrier

Just to add on to what Wick and Luna said, some toys would be good so Ophelia can keep busy. Have a fun trip!