I'd like your thoughts on this matter:
I'd like to deal with supply the way Domains at War does it. With the PCs and henchmen, we will abstract supply with the monthly cost of living charge. We'll assume this covers food and drinks and horse fodder for the PC, their henchmen, and all their mounts. With mercs, the Supply Cost charge covers their food, drinks, and fodder.
Note that these supply costs assume pack horses and handlers to carry the food, etc... I need to calculate how many of each so that you know what your entourage looks like.
If you want to bring a supply train, either pack horses or wagons or both, to carry any loot you find, there's a supply cost there as well. This would be in addition to the pack horses which are carrying your food, water, and fodder. I don't know what the cost is just yet, as the D@W rules are unclear and I have a question posed on the forums, but I'll get that info to you as well.
We'll operate in terms of months, where you pay the fee at Day 1 of every month and then you can operate in the wilderness for a month without needing to resupply. At the end of the month, if you're in the wilderness and it's not safe for your "supply train" to go back to a town and get more supplies, you suffer the penalties listed on p 58 of D@W-C under "Consequences of Lack of Supplies". For those of you who don't have this book, troops lose 1 HP per day and suffer a cumulative -1 to attack throws and damage rolls. They lose the ability to heal normally. Every week a unit is unsupplied, it counts as a calamity and a morale roll must be made.
Note that you may find places to resupply in the wilderness but at the start of the game, the only places you'll know about are the frontier settlements on the edges of Ket's domain. You can also choose to send your supply train back to civilization with mercs for protection but I'll still be making encounter rolls.
I think this is better than counting rations and dealing with how many stone of food and drink everyone has in their packs. However, it does mean you have a vulnerable supply train with you and if they are killed or run off, you could starve or at least suffer the consequences. It's harder to say "I spend the day hunting for food" when you have 60 mercs to feed as well. As intelligent foes encounter you more often, they may identify and target your supply train, especially if you don't take steps to secure it.
EDIT: Further clarification: if you don't resupply after one month, not only do you run out of food but you run out of arrows and bolts and military oil, etc...
What do you guys think of this?