Look for visitor centers, forest ranger stations, gazette maps show windmills, etc the host will know where the water is along your route if they are any good.
You can usually get about a 100 miles off them where water is found.
Bring water tablets.

Bring a tarp. Very hard to find shade, yet getting out of the shade for an hour will do wonders.

Use wic shirts.

Lip Balm

Bandana and glasses for dust storms.

get up early sleep durnig high noon.