Solar Solution Adequate?

While I understand that you may not have had enough interest in these areas to have measured usage or put meters on the system to test usage, a simpler question may be whether you have tried camping in the rig for a day or two with the system as it is now. If you find that your batteries are holding a greater than 1/2 or 50% charge after 2 days with the single panel, you know you will extend that with the additional ones. The amount of sun is constantly variable, and panels dont like even partial shade, but if a cloudy day cost you 50% of your possible charge rate, feel good knowing that you are still getting 50% of 24 amps versus 50% of 8 amps.
As to AC, thats a generator issue in almost all cases.