We only ever have shore power at home, never while away, and we like to use the microwave, toaster, etc while camping for several days at a time. The MH has no generator fitted, and can't carry the Honda3000 we have from 5er days. We do have solar (when the sun is ever out), some alternator charging, and carry lots of battery to get by.
How to do that in a Class C is all about footprint opportunity in your rig, and how much DIY with RV electrical and modifications you want to do.
In ours, the batteries are under the dinette seat next to the kitchen counter where the inverter goes under that allowing short wire run inverter-battery. Solar comes down from the roof just above that with wires hiding in a white plastic tube against the wall so not so ugly.
I would carry a 2000w gen if I had one, and needed it, but so far not.
We have AGM batteries so they can be inside the rig under the dinette since the outside vented battery compartment is too small.
So we head out with 450AH of AGMs, 2000w PSW inverter, 555w of solar on the roof, and pig out on 120v off grid without having to take it easy on anything.
The big thing is that you do have to do some serious work on setting your rig up and must have a good idea what you are doing.