We met a guy called Blair Aitken while touring Ben Lawers on Saturday. He was a friendly guy and it looked like his clients were getting good value from their day out.
He posts regularly on the British Backcountry group (as recommended above), probably easiest to contact him through that.
Lorraine McCall began her attempt today at a continuous, self-powered round of the Grahams, a four-month tour of upland Scotland combining walking and bikepacking. If successful, she'll be the first person that we know of to do it.