Bring the motor, a bag-lunch, the camera and a few bob to spend in the farm shop ! GPS and an OS map ? CB ?
Nearest fuel is Dreadnaught Garage as you enter Callander from the south or Lix Toll coming from the north, neither cheap. Note for those coming up from Glasgow that the filling stations at Ballat Crossroads and Aberfoyle are both shut, so theres no fuel now between Bearsden/Milngavie area and Callander. If coming up from that way I'd suggest coming over the Dukes Pass from Aberfoyle to add a bit more scenic drive into the day out - Its got to be better than flogging up through the 14 miles of roadworks past Cumbernauld !
G.