Welcome to the forum! This is a great place to learn and share.
For the electrical side of boondocking here are my recommendations:
-Determine how much electric power you want to use on a daily basis by building a power budget. There are several good sources to help with this. Here is a place to start
-Start with your battery bank. I would not go smaller than the amp hours you decided you need for 24 hours. For lead acid or AGM batteries you never want to go below 50% of your capacity so if you plan to use 250 AH then you need a battery bank of at least 500 AH. You can also go with Lithium batteries at a much higher cost but allow you to use 80% or more of their capacity.
-Your solar should be able to recharge your battery bank with 5-6 hours of good sun.
-You will still want a generator for long periods of cloudy days or to run your a/c.
This explanation is a little oversimplified - take the time to read and study more before starting to buy or install things.