A few weeks from now, I am flying into the US Southwest to pick up a rental car (a mid size SUV) and then drive about 10 hours roundtrip through some fairly remote desert areas for 3 days. Daily highs will be 105-110 and night time lows will be in the 50s. I will be alone. I will be returning to cities at night. I will be on paved roads, but don't know how frequently they're travelled.

I am putting together a kit and welcome suggestions, as I never spend time in the desert areas.

Here's what I have so far:

cell phone, charger, aux. battery
plb
sil-tarp and lines
electrolyte replacement mix
pre-made food for a day
sunscreen
sun glasses
bandanna

4 gallons of water that I'll get en route and supplement if used.

I'll have usual small FAK that I always carry and will have climate appropriate clothing/hat.

I'll probably buy a cheap knife just because I hate not having one.

I will be leaving a detailed itenerary with friends and will check in when possible during the day with latest location.