Summertime in AZ, I start riding at 5 am to be done by noon or so. You'll do fine as long as you plan on moteling it cuz you're not gonna want to be in a tent in the heat of the day. Call ahead to make sure places are open - as someone else said, tourist businesses in AZ are seasonal (our population doubles when the snowbirds are here in the winter) and many close from ~ April to November.
We ride Ogilby road a lot (it's white, not asphalt) - it's quiet once the snowbirds are gone, way better than 78 with its truck traffic and no shoulder. No services / water anywhere on Ogilby. There's so little shade in the area that it's worth telling you that at the junction of 78 and Ogilby, if you go down Ogilby ~ 1/4 mile, on the right there's a park sign atop a sittable brick mini-wall that throws some shade and makes a good "picnic area."