I did essentially what bruce describes on my Gemini. Added a second matching roof AC for the front, wired to a separate 30 amp receptacle next to the existing one. I use a Y connector from the two 30 amp receptacles to a single 50 amp cable and just plug into the parks 50 amp service. The only downside to that setup would be the inability to run the front ac with the generator, but while underway, with the dash air I would never need that, and we virtually always camp where electrical is available.
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