"jarata1"....It helps sometimes if you give more than needed info versus less. You don't say what brand generator you bought. Just beware, some of the brands, like the Honda, draw their air from under the generator. For that reason, you don't want to set it in the dirt or grass. Have a piece of wood cut to size to fit under it. Both my daughters have trailers and both have the Honda 2000. No matter where we're at, they get cable locked to the trailer frame. It's just too tempting, especially the Hondas and Yamahas.
As stated, just plug your 30 amp cord from your trailer into the generator. Even though this may be a new/larger generator for you, it's limited on what it will run inside. Remember when you turn it on, when plugged into your 30 amp shore cord, the first thing it will be doing is trying to charge the batteries in your trailer (powering your charger). This can take up to half the power the generator is capable of putting out when running.
If you have your refrigerator set to automatic, it's going to try and change over to A/C power, so you might want to manually set the refer in the gas position when dry camping.
No matter how many times I tell my daughter when dry camping, she'll turn on her microwave while running other large items in her trailer and trip a breaker.
Lastly, your new generator is not able to run your rooftop A/C. You need at least a 3000 watts to do so.
With all that said, you'll have to do some power management when using this new generator, it can't run everything in your trailer.