UKH

Where are  the best bivi spots at the start of cuillin ridge near Gars Bhein.

Pretty much the top of Gars Bhein IIRC, or maybe down a little on the Coruisk side where the track comes up from.

On the col above Coire Ghrunnda, close to fresh water, a few flat areas. Leave all your kit there to tick the first bit and collect 'EVERYTHING' on the way back north. You can drop your bag as you do Sgùrr Dubh Mòr too, so you aren't carrying everything until heading towards td gap.

IMPORTANT: Google about the rock instability in TD gap.