The "Best plan" is not obvious, though I think you'd really best make up your mind on your own, below you will find my analysis. Zil is for going to Gatesgarth, looking for food and for their lost lord; a worthy goal as they might have enough food to at least help, and the lost lord is a problem indeed. This is likely to be a bit safer. but with less food reward. I want to go get potatoes (food) from the Vale using a caravan. I have reason to believe potatoes could do a lot of good for the future too as they could potentially be grown at home without too much fuss. This is likely to be a bit less safe but with more food reward. Mind you both might go to hell depending on several factors; bad rolls, the situation in the place we come to, the willingness of the people there to aid us and so on. Both are somewhat of shots in the dark.