Since you are the one who will be traveling, where in Scotland are you heading. I have worked with several researchers on both sides of the "pond" and Canada and may be able to help keep you from wasting time on duplicated research (not to mention money). Are you also going to get to England? One branch of my Lambertons have collatteral lines there and in Ireland, but I do not have as good contacts in Ireland at the moment. I assume you are working on the Alexander Lamberton line, are you also interested in the other lines of this family?