I am planning on buying a fish finder in the near future. I would
like a small, portable, unit since I usually do some fishing on canoe
trips that involve portages.

Units that appear to be suitable:

Hummingbird Piranha series
Hummingbird Smartcast RF30 (Wrist Unit) or Mobile Station
Hawkeye/Norcross FF3300PX
Eagle FishEasy 2
Eagle Cuda 128
Garmin 80
Garmin 120
Others?

Anyone have any recommendations or warnings on any of these fish
finders, or others?

Anyone have any recommendations for other forums in which I might ask
the same question?

TIA