We use the CUISINART Grind and Brew Coffee maker. It is only 'ON' for about five minutes then switches completely off. The hot coffee is stored in a thermos carafe... This stays hot for many hours...
This is great for me when I am off-grid which is 90% of my camping...
This is the one I use... I of course have the ole Coleman stove top perc for backup... I also carry a MR COFFEE portable coffee grinder that will run off my 2KW generator or truck when needed...
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I also bring along my favorite taste bottled water just for the coffee maker. This insures I get the same coffee taste wherever we go...
Roy Ken