Help a newbie...generator?

Hi all. First time Airstreamer here with a 2014 19 foot flying cloud. I will be Boondocking for some days in grand teton national park. I have a solar panel which I can plug into my battery case to charge the batteries, but I'm wondering if I need to go and buy a generator. Very new to this so not sure what the advantage would be, except for I would be able to use the air-conditioner. Thoughts? If you would get one, what would you get?



My apologies in advance for my ignorance in this area.



Thanks!