Aye I'm glad I did those roads that make up the NC500 before it became fashionable. I started exploring by motorcycle the fabulous roads up there about 25 years ago, the only downside has been the midges and the rain. I do try to go outside of the midge season, and the rain, well I can live with it, the great roads make up for it.
I've been through Crieff a few times but never stopped, but it does look like a decent place to spend a few nights. Any recommendations for pubs and restaurants? Keep a look out for two V85tts, my blue, white and red one, and Dave's Centenario.