Nice shots! I learned that in addition to the sugar water feeders it's a good idea also to provide a source of food that they hunt with the energy they get from the sugar water.
I hang a cup with half a banana, peel and all near each feeder.
After a day or two a colony of fruit flies will develop which the hummers will appreciate.
Here in So Cal I don't get the congregations of hummers that you in the migratory paths get, I usually have just one or two at a feeder at a time.
You guys might need a bucket of bananas to feed all the hummers you get out there