Anyone have experience with propagating trees from seeds?

I just received an order of various native tree and shrub seeds. (Most of them come from here: http://www.nativeseedfoundation.com/)
Anyone have suggestions for likely propagation?

(Rocky Mtn Maple, Kinnikinik, Ocean Spray, Rocky Mtn Juniper, Chokecherry, Smooth Sumac, Black/Blue Elderberries, Snowberry, Saskatoon, Redosier Dogwood, Bear Grass, Red Stem Ceanothus, Western Syringa, High Bush Oregon Grape, Russet Buffaloberry, Thin Leaf Alder, Mtn Mahogany, Mock Orange)

Who has had luck germinating stored seeds? Ideas?

Also, any recommendations for seed sources for other native (Western Montana) perennials?

(Possibly another topic, but...) If you could/do have land in Montana, what trees and shrubs would you suggest to plant?

Agroforestry research in the UK sells seeds. There is in information how much cold stratification each seed needs. I guess that most of these seeds need to be cold stratified or planted in autumn if your climate is cold enough. Some might even need several cycles. Horizon herbs has pretty good information about how to germinate their seeds, but mostly herbs.