Of course, there are a lot more links to the places/businesses mentioned.
I only quote those that gave me a permission to do so.
Thank you very much to everyone who contributed.
I am sure you will find all further information via your search engine.
If you discover any broken links please let me know...
Loch Katrine
www.visitscotland.com/info/towns-villages/loch-katrine-p662921
Information on Loch Katrine and the surrounding area
Aberfoyle
www.visitscotland.com/info/services/aberfoyle-icentre-p234571
Information about the iCentre (tourist information) in Aberfoyle