For those of you with more experience using depth finders in a canoe, how are you mounting your transducer?

I just picked up a Fishtrax unit to use this summer and am unsure what to do.

I'm considering mounting it right in the boat and shooting it through the hull. The simplest method seems to be a suction cup mount on the side of the hull, and just angle the transducer down accordingly. Fishtrax also sells a telescopic arm to mount the transducer to that hinges and hangs down over the side of the canoe. It looks functional, but kind of cumbersome.

So for those who know what do you suggest?