I know, it sounds strange.  but last night I chopped up a hard smoked andouille sausage and sauteed it with some red onion.   When it all looked good I dumped a 6 oz can of Saurkraut in with it and stirred it around until it was all cooked.  I have to tell you, the tiny extra weight of the 6 oz. can is worth it.  the meal took me 5 mins to cook and it was delicious.  The kraut in a can will obviously keep on a trip, and the andouille sausage will keep well too.  This is a great quick meal for a trip!