Science offers us treats at every corner or, if not treats, then convenience.
One of my inland Derwent River chauffeurs, Andrew, alerted me to Wet Notes. When I bemoaned the difficulty of making written notes on paper notebooks in rain, I discovered Wet Notes was the answer.
These pocket sized spiral bound waterproof notebooks, containing both lined and unlined pages are produced by The Royal Yachting Association in the United Kingdom; refer to their catalogue on their website . The lightweight books are small enough for notes, but not large enough if you wish to write a novel while walking in the wilderness.
In Hobart Tasmania, the notebooks can be purchased at The Tasmanian Map Centre in Elizabeth St.
I believe other varieties are published by other organisations.