In My 2014 30DS, there are 110v outlets on the passenger side under the dash, One under the cab next to the fridge, one on the wall where the mirror and thermostat is, one in the bedroom below the drawers, and one in the bedroom behind the TV in the middle. There is one in the TV cabinet in the kitchen too. And one under the dinette on the wall that slides.
12V ports and USB's are less abundant- however as the models are made they often add stuff... There is one 12 cig lighter on the entry wall left part of the antenna booster, and one USB on the dash radio (that will depend on the brand radio you get)....I have two DC cig lighters on the dash that can accommodate a USB adapter plug ins. I added a USB Cig lighter port in the bed room connected to the overhead light because I like to charge my phone at bedside. and will be adding a 12 V cig on the drivers side connected to the leveler housing, so I can connect my phone to a Wilson cell booster next to the window.
Note that the are replacement multi-port receptacles that have one 110v and 2 usb slots that you can install in place of the standard 110v outlet, but don't buy one from Home depot or Loews, because those outlets are deeper designed for residential applications. Should you choose to swap out a 110 receptacle for a multi-use USB, be sure its a slim profile usually more expensive sold at CW. I prefer to keep the 110 v plug and use white blocks to convert to USB that way I can always use both 110 outlets.