I too doubt kraut was in camp, also due to the water weight. On a ship, kraut is another matter, as it will keep, and is what the German navy used on a daily basis to keep the men healthy (antiscorbutic - prevents scurvy) into the 20th century.
Now on the frontier, since cabbages are pretty easy to raise, and were popular, it's highly likely that frontiersmen ate kraut, at least once in their lives.
In September of 1768 George Morgan was shipped seeds for four types of cabbage, "long, early, red, and savory". (Baker, Sons of a Trackless Forest p.333) Additional cabbage seed varieties were shipped in October of the same year.
In the summer of 1769 because Morgan in Kaskaskia was selling to local French settlers, as well as to the local English garrison, Morgan encountered Soup Meagre, cabbage soup sans meat. In fact at one point during the summer, it was customary for an entire meal to consist of several cabbage dishes.
Now I'm not sure cabbage boiled in whole milk would be very good, but fried with some salt pork, might be right tasty. (Baker p. 339) I've had it fried in salted butter, a combination of both red and white cabbage, and yowzaa I went back for a second helping! Morgan wrote to his wife that four cabbage dishes in one meal made him "sick of cabbage", but on the other hand his English partners shipped him more than four varieties of the plant...for some reason. So perhaps cabbage alone (sans meat) was his complaint. (Anybody for a good cabbage roll :grin: ???)
Baker also notes he found a source in 1762 of request from a junior officer to Colonel Henry Bouquet for two padlocks, one to be used to secure the "cabbage house". (Baker p.339)
So at an event, especially Winter, or in early Spring, cabbage and/or kraut would be a good choice, if one is replicating what would be available at that time of year.
LD