Wavebox Portable Microwave Oven--US$250
Why waste time popping popcorn on a camp stove when you could be using the [[xref:http://www.thewavebox.com/waveboxproducts.cfm|Wavebox portable microwave|Wavebox portable microwave]]? Granted, you have to attach it to a vehicle with a power outlet or a 12-volt battery, but that's a small price to pay for such a modern convenience, right?
The Wavebox is a self-contained suitcase with a heavy-duty handle and rubberized, no-slip legs. You also can plug it into a normal electrical outlet if you have access to one on the road.