I do definitely think that a base of operations of some kind would come in handy, as for dealing with the numbers we could pull off so simple guerrilla warfare? Pick off small units one by one until their numbers start spreading out, then by that point draw the remaining forces to a final battle, while we pull off our fighting no where near our battle and possibly just destroy the supplies and anyone who stayed behind. Just a vague idea but one non the less. Needs a lot of work though, just something I came up with on the fly kind of thing. Also sorry about mis-understanding, I was like half asleep when I was reading the last couple time.