After camping Friday night in the woods near Derry Lodge (very windy), my two friends and I met your group beside Glas Allt Mor on Saturday (you've kindly included a picture of me beside the 'stream'!). For about an hour, we attempted to cross the water en route to Derry Cairngorm...but despite removing boots and braving the freezing water, it just wasn't safe enough to cross. At that point we discussed following the route that your group had taken, but your trip report pretty much sumarises the conditions we expected we'd encounter. Down by the water, the wind was slack and the sun was warm, so we called it quits and had a snooze instead
. Glad to hear you all got back safely...but I suspect your post-hill pub conversation was more interesting than ours was!