I use solar to keep battery charged, power the basics in our TT with enough to run the fantastic fan full bore 24x7, radio when we want that.. lights..and still recover if we have decent sun.  I'd rather not run a generator (even though ours is pretty quite).
We have a portable generator we bring when it's likely to be really hot so we can run the A/C when wanted.
That being said we can power our TT fine for about 5 days on a single group 24 battery, and that's not really worrying about conserving.. we turn off lights when not in use and the like but don't think about power use at all.
I don't think you can fully plan up front what you'll need until you've actually been out and 'done it'.. then you'll start to get an idea of your specific needs as far as power.  Plan on adjusting your plan...