The most important thing is a good attitude. All the little stuff can be bought along the way. You've covered extra fuses. A few things on our must have list are: white lithium grease to lubricate outside, silicone spray to lubricate inside, extra cabinet latches and the screwdriver needed to replace them, duct tape, oil for the rig.
On the human side make sure you have prescription meds plus basic OTC meds including something for allergies even if you don't think you have them. Also a first aid kit is a must and pain med (Aleve, Advil, etc.)
Ear plugs are nice just in case. Bug stuff, sun block, anti-itch cream. Umbrella or rain gear. Charging cords. A good chair, a good book, and the ability to adapt, relax and enjoy. Don't sweat the small stuff. There are stores almost everywhere and you need less than you think Have an awesome trip!