There are indeed only 15 teams. The search is permanently on for a 16th (as far as I'm concerned we're three short, not one) but theres debate over whether theres anyone of the standard (seriously).
Other than Golspie, Banks O'Dee are the closest thing to a 16th team now, and take part in the Aberdeenshire FA pots. I don't know if they plan on stepping up this summer. Other names touted are the usual Strathspey Thistle, Dufftown, Alness, Invergordon, Turriff United, Ellon, etc., but no one seems to be able to get it together. Now the Scottish Cup features us all, it might tempt more out of the darkness.