Thanks to the Access Code you are able to have non-motorised responsible access to land. Note though Loch Lomond have recently introduced some bylaws prohibiting wild camping in some parts of the park. VisitScotland have some great advice for wildcamping in Scotland, links to the Access Code, a pocket guide to camping etc.

I'd advise heading further north to north west Sutherland for some fantastic scenery, fascinating history and great hospitality!

I don't seem to be able to post a link but you should find it if you do a search. Try Venture North's heritage map too!