Fortress was a good trip but the approach is so long just to get to the base of the old runs then you get to actually start your real ascent.
Another place I know there is a lot of backcountry activity is near Bow Summit. I know a lot of people make their way up there the downside is it is 2.5 hours away and the sub alpine runs are all only about 25º in steepness. The alpine runs are steeper but too dangerous this year.
My next trip out I am considering renting a split to see how I like it before possibly taking the plunge for a split board. To hijack my own thread I WANT one of these Prior boards