I never thought she had an excuse for shooting, just a reason, in her own mind. Gee, maybe the family can talk her into a nursing home, thats always a fine choice. I know her daughter and grandsons, they are very carrying and concerned people. People live in rual areas for a good reason. CNR's perception is on the money.
Others responding to this issue are correct. Every one has right to the river, every one can run a sled, driftboat or sailboat on the river.
It's all legal. Just for a moment think what she must feel like.

P.S Drifter, you should play golf, I'll give you a stroke a side.