How big? Generator question

[Low Fence]

I have a 28' camper that I'm taking out of state in a few weeks. Won't be using ac but I will in the summer

I'm horrible with electricity and have no clue how to convert anything. My breaker panel is as follows:

Water heater- 15
Utility- 15
Ac- 20
Refrigerate - 15
Microwave- 15
Main - 30

What's the minimum I can safely run everything at once. How many watts am I pulling at start up?

[dbrock63]

I have the same size trailer and the standard 5500 generator works fine. I still can trip the breaker if the AC is on high, water heater is on and I try to use the microwave. We have 2 30 ft trailers hook to this same generator from time to time and have no problem running both AC's if water heater and Microwave in not running.

[mchildress]

You need at least 4000 watts.