Since I was not sure about my "right" to wear the MacLaren tartan I contacted the clan society.
I told them what I knew about my Laurie ancestors and asked if I was entitled to wear their tartan...I was welcomed as a clanmember.
I had a very nice email conversation with Hugh MacLaren, I was invited to join the clan society, but not "pushed". It was not something like: "yeah sure! pay and all is fine".

I'll visit Balquhidder...the clan seat...this summer. I like to learn all about the clan, goes without saying I wear the tartan with great pride.