1) Do some learning on AC & DC electrical systems and how power is measured.
2) Do an assessment of your current power usage.
3) Figure out what you could live without from your current power usage.
4) Calculate the remaining power needs.
Do this before buying anything.
- If you are a minimalist camping on moderate weather, you may not need to do anything to dry camp.
- If you aren't willing to give up creature comforts, a solar system and other purchases may be a waste of money as they won't meet your needs and you will have to buy a big generator.
- Most likely you will fall somewhere in between.
If someone tells you to buy X, given what you have told us, run away from the advice as they have no clue what you need.