We have solar that usually has our battery bank fully charged by midday. With that in mind, I wouldn't even consider RVing off the grid without a generator. Not an issue as we have an Onan onboard which powers our rig as if plugged into shorepower.
Onan has 1K hours over 9 years, plenty of life left providing reliable power to our rig. Even so, we purchased a Champion remote start inverter genny in March and it has been absolutely flawless. Our Onan, although incredibly durable, is overkill 90% of the time.
For the most part our generator gets very little use while RVing without hookups, but Mother Nature doesn't always provide great camping weather. RVing with my family I don't want compromises and that's when a properly sized genny shines above all else.
Of course we have solar, golfcart batteries, and both pure and modified sinewave inverters which all serve their purpose well. When circumstances demand more, a simple press of a button and all is well. Our Champion readily powers our AC, even at nearly 9K elevation.