I don't know who told you it 'will not work' - it will work great!
You can go to Home Depot and buy the 120/240 volt locking 30 amp plug, and then wire it to a RV style receptacle, 30 amp 120 volt. Use the silver terminal for the white wire, green for ground, and ONE of the two brass screws for the black wire. This will limit you to 'just' 3,600 watts or so. One A/C and the microwave, battery charger, ect.
If you had a 50 amp RV, you could use both phases of the generator, and supply more power to more things. This will be a heavy generator, and probably pretty loud.
I hope that you are not running the generator a LOT when camped anywhere near me. The Honda 2000 generators are only 47 pounds each, and can be paired together for 4,000 watts starting current, and 3,200 watts running current, plenty to run a large A/C unit. They are also about 50% of the noise that the conventional 'contractor' generator will make.
Good luck,
Fred.