Reply to People that have done outdoor parties with no power, what have you used?

I'm organizing some parties that will be going from place to place on a trip and some location will have power and some won't. I'm trying to get a list of things together to have pretty damn good sound for about 100-200 people like on a beach, or camping, or whatever.

So far:

- Dj gear (CDJs, DJM) etc.
- PA system
- Sub
- Amp
- Generator of sorts?
- Lights/Lighting rig

Is there anything I'm missing? Could you give some suggestions on the system itself? I've never really organized anything like this before so I'm not sure what size PA's, sub, or amp to get. Everything I've ever done has already been set up or in my home/house parties with monitors. Also will a generator be able to power all that? I'm going to try to research prices to rent and buy some of the stuff. I figured before I go blindly looking on the web, I ask you fine folks.