Modern-day attachment to a clan is based on the family name, and assumed genetic linkage, but in earlier times many people simply associated themselves with a clan, and took the clan name, for protection in more lawless times. The clan name may be inherited, but no genetic inheritance as such, and it is almost impossible to identify the original family name, unless a document refers to them as, e.g. "Gordon, or McWilliam".

The clan system died out in the lowlands to all intents and purposes, so it is the Highland families that are clan-oriented. There are many clan societies, too. BUT, there is more Scottish clan activity abroad than at home. Don’t expect too much of being part of a Scottish clan, unless you are an American. My Scottish family tree, with over 10,000 people on it, has practically no clan connection.

By all means come and visit, but don’t expect everyone with the same surname to regard you as a long-lost relative. You will get much more of that in the USA, with many "clan gatherings" to attend.

Clan coats of arms DO NOT EXIST. Coats of arms were granted to individuals such as the clan chief, and are exclusive to that person and his direct heir. Clan members can wear the clan crest (the top of the coat of arms) or a clan badge (often based on the unique belt buckle of the clan).

My advice is to concentrate on proving your genetic inheritance, and if you find you have a clan involvement, regard it as a bonus!