I've been reading this forum with interest and have to chip in my two-pence worth and resurrect this thread.
Been doing the SUW this year in chunks with my 10 year old daughter so that stuff about being extremely fit is nonsense- all you need is a tent, use bothies and I wouldn't take her out if the forecast was really bad.
I'm just back from Dalry today which we've done in 3 2day walks. Camped once and stayed in bothies 2 nights.
Of course it's not perfect but I love the fact it's quiet and you're rarely near a main road- unlike the WHW- which we did last year and loved. Doing it this way you really get to know your bus and train routes !
New merks are installed and you can even find some of the old ones mixed in with them.