A 1000 watt or 1kva generator is perfect for low power usage while camping. It will run your fridge, phone chargers and lighting.
A 2000 watt or 2kva generator can be used when camping if you need that extra power for your campsite.
Warm the generator up before applying the load.
Run the generator between 60-80% of its full load rating. E.g. 2000-watt generator should run 1400 watts.