Not sure all your ?'s got answered.
Deer browse the new growth on willows at my place heavily. I've got about 100 hybrids that are unprotected, three years old and just making it to 4 foot tall. Their more like bushes because the deer eat them down and they sprout like crazy.
Rye will grow in the back of a pickup if it gets some moisture. Any seed that falls in the cracks of the chips will grow.
Your not planning on starting the cuttings from big rock in tubs are you? If so don't bother, just poke them in the ground where you want them. Along that stream they will grow.