so, from Edinburgh,
over the Bridge and through Rosyth towards Dunfermline, picking up the A823.
Follow the A823 through Dunfermline towards Powmill (past Knockhill race circuit).
After Powmill, left (still on the A823) to Yetts o Muckhart.
Nadgery junction follows, take a right turn, then immediately bear left following signs to Glendevon.
Through Glen Devon, Glen Eagles (crossing the A9).
Stay on the A823 until it becomes the A822 and goes into Crieff.
In Crieff, go along the High St (heading towards Perth).
After 2 miles or so, and a set of s-bends, take a left at Gilmerton.
Through Sma' Glen (bits of Wade's road), and past Amulree (hotel was an old Kingshouse for English troops)
left onto A826 to Aberfeldy (72 miles from central Edinburgh).
leave Aberfeldy over Wade's bridge, towards Weem.
past Glengoulandie (Schiehallion on the left, where contour lines were invented) and left after Tummel Bridge (another old Wade bridge).
first right (sign The North), then next right to Trinafour
Immediately after Trinafour take a left signed Dalchalloch
after going over the top, you'll join the A9.
take a left and then pull off at the next left, Dalwhinnie.
Then it's Laggan and Spean Bridge, and up to Glen Affric.
I cycled this a few weeks back, and it's one of the most spectacular routes I've come across in central Scotland (I think).
Aberfeldy, nr Tummel Bridge, Kinloch Rannoch, Glengoulandie all have campsites.
Do you have a spot you've been to before for camping nr loch rannoch ? I can do a wee recce for you over the next couple of weeks, just to double check the possible sites. Unless someone else already knows. Certainly higher up everything was pretty sodden because of the snow, and all the lochs were still frozen.
On a good day it's definitely worth going through glen devon, glen eagles, and sma' glen. the road between Trinafour and the A9 is also really good, and is a shortcut.