Follow my progress as I attempt to walk the length of the UK, from Dover to Cape Wrath, wild camping every night. This chapter is the third part of my walk along the Scottish National Trail, from Milngavie to Pitlochry. I follow the West Highland Way until Drymen, and then the Rob Roy Way to Callander. Then I follow paths and tracks through Comrie, Aberfeldy and then Pitlochry.