Sorry to dissent but I don't find w6lmj's goal all that outrageous. I have the same issue. I was dry camping three weeks ago in a National Seashore park and had the same problem. Five in the morning and I wanted a cup of coffee and a toasted bagel. There were no hookups and it was too early to fire up the genny.
I'm solving my issue with by purchasing a River Mobile Power Station from Ecoflow Technology. It provides 116,000 mAh/412Wh with two AC outlets, a 12V outlet and 4 USB ports. The version I'm purchasing comes with a 50W solar panel that will recharge the unit from dead in about 10hours. It weighs 11 pounds and is about the size of a 12 pack of beer. When it is released in August you can buy this setup for $999, but you can pre-order now for $750.
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