Nice mature looking plants and love those red berry pods.
No doubt you have a really good chance of success with your plantings in that area.
One possible down side is planting in large patches.. you could start up disease issues. I would keep the patches small and would plant no more than 2 seeds per sq ft.
I have seen first hand what happens when you plant large strips of woods with seeds 4-5 per sq ft. If you are not going to be out there spraying fungicides on a regular basis, very few of them will actually survive.
It could even take out your mature plants too.
So that is one caution I would give you, plant small patches and not too many seeds per sq ft.
Take it slow and see how it does.
I would also leave those big 4 prongs and plant those berries for several years - your absolute best seed supply right there.
Good Luck !
TNHunter