I asked Matt a question about food and trail rations. I'll post his answer here so everone is in the know and he does not end up answering the same thing 5 times.
I typically assume 5 lbs. miscellaneous encumbrance for each character which covers incidentals, a modest purse, and a day or two's worth of food. I think in terms of weight, that should cover it.
Since you all specifically talked about equipment et al., we'll say that each member of the warband has two day's worth of field rations (water, bread, cheese, and a small amount of salted meat or fish). Beyond that, you'll need to forage.