Canoe or very small boat yes. My 16ft bare bones Crestliner, with a 25hp motor, would be a major struggle. Lot's of climbing out, dragging, boogering up the transducer, etc.
If you're staying on Cullen, you'll need to trailer to Nisswa lake, Zorbaz landing on Upper Gull or Hole in the Day bay.
Best bet would go to the Zorbaz landing on Upper Gull. When you're done, Excellent pizza & beer is right there! Cheers.