I seem to say this a lot but I'd forgotten just how nice parts of this trail are :-) Some lower portions of the trail are simply a delight to walk, with a soft trailbed further cushioned by countless hemlock cones (western and mountain varieties). The upper sections of the trail are wet, as to be expected, and in a few places it may feel more like introductory canyoneering with a running creek cascading over the roots and rocks.
The Baden-Powell trail is about as dry as it gets - almost no mud. Creek crossings are easy, and the mini waterfalls are photogenic right now. The Old Strachan trail is a delight (with a single downed tree that momentarily diverts the trail - watch out for that) and the forest here contains many grand old trees. The Hollyburn Giant is really quite spectacular.
Snow begins about 1050 m, as the trail enters the marshy meadows close to the steep Hollyburn access trail. It's sporadic for a while after that (as the trail pushes uphill again) but is continuous from the next meadow up to the summit. Trail markers are visible from time to time but if you haven't hiked this trail before (or don't remember where it goes) then route-finding will be challenging. In that case, I'd wait a few weeks before trying this trail or make use of a GPS track. The snow is soft and not always supportive. Gaiters would be useful... (Guess who didn't bring any?)
Above the plane wreckage the steep trail is mostly easy to follow but as I mentioned above, it's wet. Be careful of the snow here - don't assume it can support a hiker's weight. Where the trail is snow-free, it's a running stream complete with occasional waterfalls. And yet it's surprisingly easy to stay dry (at least if you have waterproof footwear).
The final approach to the south summit is soft, sun-cupped snow. We ate lunch on the chairlift platform with a group that had walked up (and then returned via) the ski slopes. Getting over to the north summit was straightforward although the descent into the col was a little tricky. Those nervous about descending snow slopes would probably not enjoy it. North summit views were as grand as ever. We opted to return the same way (which meant we got to enjoy the trail all over again :-), as the entrance to Christmas gully looked a bit iffy. Coming up looks like it would be fine though and one hiker we spoke to said it was OK.
Flowers: a few yellow violets, some purple violets (!) in a little marsh by the B-P trail (deer cabbage to come there), some skunk cabbage still pushing through higher up. The berry bushes are in full leave and budding lower down; above the snow line the leaves are barely coming out. The changeover was really quite marked too. Rosy twisted-stalk is beginning to flower. The B-P trail is lined with queen's cup, many of which are budding: in a few weeks this part of the trail will be a wonderful avenue of ankle-high white flowers. I plan to revisit it then :-)