Personally, i would do that walk in the opposite direction, as the scree slope down to the Miners path from the Glyders to Bwlch Tryfan, is terribly eroded and very steep, far easier going up it, than coming down.
Its a bit of a slog going up the scree, but as your traverse of the Glyders has yet to begin, you can pop off to the nearby Cantilever to have a snack and recharge your battery's.
Once your on top of the Glyder plateau, there are no sheer drops, or exposure, as the plateau is very wide, so no problems should be encountered.
Either way, you will return back to the same parking place on the A5 in Ogwen, which ever way you choose, but going up the horrid scree path from Bwlch Tryfan, is a lot easier than coming down it, and you will miss nothing upstairs, which ever way you choose to go.
Once you have crossed the Glyder plateau, visited the Cantilever rock, and descended down the easier elevated scree path from Glyder Fawr to Llyn Y Cwn, the distance to Yr Garns summit is not very far.
Return from the summit of Y Garn , back down to Llyn Y Cwn, and then descend down the Kitchen path.
Which ever direction you choose to do this memorable classic, its a great day out, but if your able, choose a sunny day, as the panoramic views are magnificent.
The late Showell Styles, a well known author on Snowdonia, claimed that Y Garn had the finest view in the whole of Northern Snowdonia, so is worth booking a lovely day to see that view.
If your unable to go in good weather, its still a memorable outing, but the rocky plateau of the Glyders, can be very confusing in mist.
Ive done this traverse a number of times, and its one of the finest walks in Northern Snowdonia, almost as good as the Carneddau.
Take my advice, and if your able, try and fit in this walk when the weather is fine, as you will be rewarded with a brilliant day in the hills.