We have done that trip with the grandkids many times (recorded how long an ice cube takes to melt in 105 degree dry heat!!) With your size coach you will need an extra AC.. No need to upgrade to 50A ; we just run a 20A line from the second AC to the pedestal. This means you only have 2 ACs when on shore power. Generator will only support one AC.
So before hitting the road cool it down as coach will heat up with one AC plus the dash.
We added the second AC in our first year and it has been a lifesaver. Buy a 50A to 30A & 20A plug as some campgrounds have 30A only pedestals and 50A only pedestals with no 20A option.
Back when we got our ACE 30.2 there was no option for 2 ac's; now new units can be ordered with 2. You could say we were ahead of our time!
Good luck. Dry heat is still heat.