Amount of crystal backcountry terrain is huge, and much variety. Lots of it is sustained steeps with limited terrain anchors so partner skiing with avalanche gear recommended. Other areas have more trees which lessens slide hazards. Some far out-of-area terrain that is still accessable to northway shuttle bus pickup has large cliffs and very long avalanche chutes. Last year the resort did major tree pruning work that increased the effective acreage of tree/glade skiing significantly, and caused me and others to do a double-take these two past weekends as we now have many "new" areas to ski that previously were overgrown and very hidden. I've skied crystal 23 years and continue to be amazed at the bc terrain. You will need to hook-up with locals willing to show you around. Some of the terrain is straight fwd and obvious, like most of southback, and you should be
able to figure it out just by following the hikers.
Northback is more complicated, as there are many more starting points (northway peak+bowl, morning glory bowl, beyond morning glory, paradise bowl, paradise cliffs, spook hill area, guntower/niagaras areas, L-angle area) and local knowledge of lines from these areas is recommended. Return from nback requires knowledge of I5/ho-chi-minh trail connections so that you don't end up down northway with no shuttle-bus service, or worse, bushwacking down stump farm which is very overgrown this year (I verified sunday). You are lucky to have moved to an area with such great "in-area" backcountry terrain.