Kelleris said:The logical way to go from here is to give sinister conspiracy-style origins to other famous monsters. Hmm...
Other monsters/weird critters/etc.:
http://en.wikipedia.org/wiki/Category:Cryptids
The various other lake monsters could also be aboleths. Maybe the humanoid critters (Sasquatch and cousins) are actually sitings of grimlocks, and that means mind flayers can't be far behind. Maybe there's a secret war between the aboleths and the illithids. Or more likely, both are fractious and try to get the better of each other as well as the enemy. So Nessie sometimes helps the mind flayer faction located in faraway British Columbia (whose servants are the source of many Sasquatch sitings), because that hampers her rival, Ogopogo (lake monster of Lake Okanagan).
Another angle is to look for connections between famous people and places. Interestingly enough, the first person that popped into my mind when I was thinking about a British Columbia - Scotland connection was Sir Sandford Fleming, a Canadian engineer who built much of the Canadian Pacific Railway and invented universal standard time, the system of time zones we use today. I thought of him because I knew he was born in Scotland; on looking up his bio in Wikipedia, it gets even better, he was born in the same town as Adam Smith. So maybe the whole Canadian Pacific Railway was actually a cover for depositing one of Nessie's offspring in Lake Okanagan... and then that raises the question: what nefarious purpose is served by time zones?