One trip I outfitted the food without anyone's help.  For reasons that are lost to me now, I bought powdered cream of broccoli and cream of asparagus soups.  My calculations (and this is extremely vague) were something on the order of a 1/2 gal./day/person of each soup, meaning I bought lots.

Nobody ate any, let alone a half gallon per day.  Never again.

However, for a number of subsequent trips we included the soups as a 'tradition' until, after a number of years, the soups soaked up enough humidity to become 'soup rocks'.

I think it was last year we didn't pack them...seems Danl didn't like carrying them, saw us trying to sneak them into the food pack and protested.  He hardly complains but for this stuff he was adamant.