Here is my setup, currently the sonar puck is for my 12 foot boat transom not my canoe, but I can change it to the skimmer transducer quick enough.
The silver clamp is for clamping truck box caps on pickups and I added a piece of snowmobile slider material to the screw clamp.
The sonar pictured is mounted to a quick clamp from CTC which I can use on a boat or canoe.
This one is what I use for portaging my small boat or canoe, or my bud's scanoe into small lakes and rivers.
It releases quickly and gets put into a cooler along with the bait, days catch, etc. I put a shoulder harness on the cooler to portage it also to allow my hands to be free to carry other stuff or move sticks, branches out of the way.