Quite safe, if you are an expert.

As promised, the article from my 1928 Kodak magazine all about setting sail in an old tin bath. Makes quite fun reading and some of the information is of course relevant still.
All I would say is ignore his parting advice. Hazardous adventure should definitely NOT just be left to the young!

Dramatic and Dangerous Places to Photograph for the Terminally Unfit and Navigationally Challenged Older Person