If you want the "experience" of being plugged in and able to run everything without having to wake up in the middle of the night to refill gas, etc., the 2 Hondas hooked together plus an extended run fuel tank, will give you that without sounding like you're running a megawatt lawnmower. You can get everything in a single larger model, but the physical weight of the unit goes up significantly. Some have wheels, but you still have to lift the monster into the truck bed for portability. Just something to think about.
We got ours here -- price was the best around (no sales tax outside of Illinois; free shipping):
Honda Portable generators > Great For Camping, RV, Tailgating
Extended run fuel tank under "Gas tanks and cans" (scroll down to see "6 gallon extended run fuel tank")
Honda Generator Accessories > Storage covers, spark plugs, wheel kits, parallel cables, rv adapters
These guys were great answering our questions and making sure we had everything we needed (all additional cords, plugs to run all this, etc.). Make sure you ask if you have all the accessories you need (some included; some you have to purchase separately). There are additional attachments available if you also want to be able to use these for residential use (i.e., running your house fridge when power goes out, etc.), so ask about these too if interested.
Also a good idea to get some good locking cables for added peace of mind (or to at least make them harder to walk away with for anyone trying to snatch them up). Many secure them to the trailer frame with the cable, or keep them secured in the truck bed (just make sure they have plenty of ventilation if you have a bed cover).
We are on year 4 with using these when dry camping and they work great. If you're going to, say, have your air conditioner on and someone wants to use the microwave or hairdryer, you should just run ONE of these appliances at a time (turn the AC off temporarily) so you don't trip the breaker. Ask me how I know this...
Honda is not the only game in town for quiet generators (some like Kipor, Yamaha), so you might want to compare price, features, and quietness among these. There are also other cheaper alternatives, but they are really, really loud.
Good luck! Hope this helped...