Sometimes generators are a necessary evil, but for most caravanning there are viable quite alternatives. Space, water heaters and fridges usually have a gas powred optoin, Use a gas kettle. For those electric items that you cant leave behind, things like TV's are often available with a 12V alternative.
Saving power
There are traditionally two things that drain 12V power more so than you might imagine, mainly because they are used for longer periods, Lights and TV's - Each traditional fluorescent fitting uses about 1.2A continuously - that adds up over several hours typical usage - so consider changing the lights to LEDs and that goes for any spot lamps also. regardless of which type of light you have make sure items are turned off after use. Limit the use the TV gets.
No 230V -
quits simply if you don't have an EHU don't use the more powerful devices (hair driers etc) for smaller items you may find that an inverter may provide what you are looking for, but be warned, that a 100W 230V device will still use 100W of 12V power which will be about 9A (allowing for losses) draw through an inverter.
Recharging the 12V battery
The simplest is the use of a solar panel. It is generally found that a panel of 40 to 60W is enough to extend the charge capacity of a battery to over a week or more.
Alternatives
Arrange a second battery box in the car and charge that battery whilst you travel around the location and swap it to the caravan when necessary. This arrangement needs some work to make the car installation safe, but it can be done.
There is a rather expensive alternative,and that is to buy a Fuel cell - clean and quiet by mighty expensive.
Small Generators
All produce some noise, which many people do find very annoying. They are hopelessly inefficient at converting fuel to usable electricity, and they use what is probably the most expensive fuel available - forecourt unleaded.
Add together the cost of purchase, maintenance and fuel, and you could buy a lot of LPG to run the fridge, water heater and space heater.