Not having the book, I will assume it will look like most of that area from photos I've seen of this campaign.
So, ground material, any geographical features can be built up with foam and then covered with whatever you will use for ground material, (celuclay, paper mache, plaster, etc.) some kitty litter or small rocks to give the area some detail. Any snow in the picture? Talcum powder, baking soda, celuclay painted white all make good snow. What other features are there? Soldiers inspecting the crash site? Just crashed, or been there a while? Any wildlife that might give you some "eye candy" for the scene. Water birds like gulls or terns, puffins, a fox, bear, etc. What are you trying to say with the scene? Bits and pieces of wreckage, much of which you can probobly scavenge from the kit or other kits or scratchbuild. Dead pilot, live pilot, no pilot (did he walk away?)
Think of the mecahnics of the crash. How did it come down, did it belly land, nose in, wheels down, stay in one piece, become one with its environment?
I will add, have a firm idea of what you want to do. Somebody before said (me) that have a destination for your journey, otherwise you will go nowhere.
Good luck and keep us posted. You will of course have to show us the obligatory pics of this project.
Mike
Mike
"Imagination is the dye that colors our lives"
Marcus Aurellius
A good friend will come and bail you out of jail...but, a true friend will be sitting next to you saying, "Damn...that was fun!"