In reply to DR:
A few suggestions.
Park above the waterfalls at the top of the glen, from there ride up Lairig Eilde and down Lairig Gartain. Helps to go with the right attitude towards wet feet and carrying. If you don't have a car you can get to the parking bay riding mostly off road from where the old road (Clachaig turning) meets the A82.
Ballachulish- Glen Duror - Ballachulish, basically a loop round the south of the Ballachulish horseshoe. Good descent but not a soft touch. There are also some tracks/trails in the forest on the North side, certainly quick descending those.
If you do the Devils Staircase then do it as an out and back. The ride up from KLL to the top of the staircase is not that bad, I rode most of it and I'm rubbish going up. On the KLL side the only really tech bit is a short section immediately after where the WHW (coming down) meets the Alcan road.
Most of the stuff in KLL is either steep or quite techy or both. A very non-tech ride is up to Mamore Lodge and follow the estate road all the way out to Luibeilt Bothy at the top of Glen Nevis. Good scenery on a nice day and feels remote but the riding is easy, the ride back is a pain if there is a westerly blowing!
If you can get to The Fort there are more options.