Wow! And I thought I went through a lot! Good thing you get it wholesale! That's a lot of birds.
I'm not really sure what to plant, partly because I'm not sure yet what I already have. This will be my first Spring in this place and I may not be able to identify some of the plants and shrubbery until it leafs out, or even blooms. I'd like to plant a Dogwood, but it wouldn't flower this year. I also would like to attract Cedar Waxwings. They seem to be kind of fickle little birds, but very enjoyable to watch. I know they are native to the area and they eat berries of some sort. I haven't seen any since I lived in Georgia.
Here's a short list to get your started:
Aronia brilliantissima - red chokeberry
Aronia arbutifolia - black chokeberry
Ilex verticillata (female) - Winterberry Holly
Viburnum trilobum - American or European Cranberry
Viburnum (can't remember variety)- Arrowwood
Viburnum (can't remember variety)- Mohican
Viburnum (can't remember variety)- Lantana
Viburnum (can't remember variety)- Praganese
Actually, there are 40 of 49 varieties of Viburnum which carry berries through the fall and winter. All are excellent.
There are more, but IMO, these are the more prolific and best to go with.
Cedar Waxwings like a tree called "Service Berry." It is a multi-trunk tree and the berries are sweet. (The tree does shoot sucker shoots but I just clip them off). I have seen Waxwings between two 7-story buildings not more than 30 feet apart, feeding on these berries. I planted two of them and the following spring I had my first waxwings. They seem to travel in groups. I was thrilled. Looking for them again this year.
I think the most important thing to birds, besides feed, is water. And the sound of tinkling water attracts them from miles around to drink and bathe. Just a little fountain in the garden or on the deck will bring you delight in seeing their antics.