Somehow "hookups" seem counter to what "RV'ing" is about.
Hookups are a bit too much dependent on close-by civilization in order for me to feel that I'm getting away from it all. Generation capability is needed in order to complete the self-containment picture. Why are RV owners all over (the world) spending their $$$ over and over and over again for generators, then refusing to use them and then also bad-mouthing them in the forums?
The seasons may be getting on-average hotter and hotter, so I can't see restricting one's camping to only hookups or higher altitudes. One of our most interesting RV exploration stops was in the Texas Panhandle in August. That experience required BOTH our built-in generator for rooftop A/C and the ilding main engine for cab A/C. They were priceless at that time ... and the "noise level" was not important.