Tanya, I was in Sicamous on Mara lake for the last 2 months giving lessons with Evolution Boardriding School... too bad you didn't make this post a while ago!! However, Jeremy Matthews might be doing some traveling lessons, he is the guy who runs Evo. He will charge for the full day of lessons (assuming you are using your boat), and the gas money to drive up there from Sicamous. But talk to him for further details... 1 403 852 5312. That is the school number.
Jeremy is one of the TOP coaches in Canada. He was the Canadian National Wakeboard Team coach for a while, and currently runs one of the finest schools in the country. He might be a little busy if you call him this weekend, he is one of the head guys organizing Nationals, where I am headed tomorrow morning, but feel free to call. http://www.evolution-wakeboard.com/