I know it gets overwhelming but that's because we all do it differently, have different needs and budgets. Take it slow so that you have a chance to understand your needs and you will be able to develop a solution that fits you and your budget.
Can you run a generator daily to keep up a single 12v battery? Lots of us have or do so on a regular basis. There is a poster here that runs his twice a day but he has so pretty heavy duty power needs. The downside is gas isn't cheap and you have to listen to it. When in a campground not only do your neighbors have to listen to it, there may be restrictive times that you can run it.
$3 a watt for solar is a bit pricy for me, then again I'll have 450w running this year and will have less than $400 into the system. I did it by watching craigslist and ebay while having the patience to wait for the good deals. I also don't worry about having top of the line gear because up where I go, there is no one to be impressed. I just need it to function.
Here is a link to a 200w system for $289.
clickThat is slightly smaller than the 230w system that kept our single 12v battery up all summer.
Take it slow and research. After a while you will have a good idea of what you need.
