I have always thought it would be best to have the food forest cover part of zone 1 and zone 2. The portion in zone 1 would be tended to and observed more often, so needier species could be established and maintained. While the zone 2 portion would be bigger
trees, more weedy self seeders etc.
Or if your zone one is already packed with more intensive things, the food forest would be spanning zone 2 and 3.
I live on a small plot so my
chickens and forest gardens are right outside my door, mature pecan tree is beyond that in more of a zone 2 position. I imagine though if I had more time and interest in an intensive kitchen garden I would have that closer to the door and push my forestyness a little further out.
Then Again if my
land were bigger, then everything I have now would probably be considered zone 1 and the zones would be redistributed into a bigger radius.