Havent met the guy yet. That cottage was up for sale a few weeks/months ago and this must be the new owner... Like Cindy said, there is another option for portage and scout river left after the first little class 2-3 but less of a better view and trail..
Normally, land owners dont "own" the first few feets of riverbanks, because of water levels/erosion etc...so it is possible to walk a rapid without "being on ones property" but with the cliff there...its porbably does not apply.
Also depends on the tone of the paddler as well. I know quite a few arrogant paddlers, even if they use proper or cleaner terms and tones...