An additional pointer from recent experience...
Woodland Scenics needs to be a little more truthful on how to use their products. The videos are always brief and make it look like, "gee, I just sprayed glue and placed the scenery on there! Then I went on a vacation..."
Their Scenery manual tries to give the same impression.
Look, if you have to make a mini-lake of scenic glue to hold down snow, then sprinkle the snow on and make another mini-lake... TELL ME THAT! Don't make me endure frustration with your products. TELL ME the ugly truth, and I can work with that!
I actually ended up ignoring the Woodland Scenic method of attaching tunnel portals because... it didn't work that well. I relied on the John Olsen "runny hydrocal and brush it on" method. That worked wonders.
Give me step-by-step detailed information in your scenery manual. That's what I need. I'm not a "Model Railroader from the old days looking to do it better", I'm a "Only 4 years in the hobby" railroader.
Now, the manual is VERY good at explaining rock coloring, and things like that. But please... don't gloss over difficulties, just give it to me straight.